Every parent knows the frustration: you’ve dressed your little one in adorable outfits, only to have pants constantly slipping down during playtime, diaper changes, or that crucial nap. It’s more than just a style hiccup—it’s a practical headache that interrupts precious moments, causes discomfort for your baby, and leaves you constantly readjusting seams and hems. Those dropped pants aren’t just inconvenient; they can expose delicate skin to cold surfaces or irritate sensitive tummies, turning simple outings into high-stress scenarios. But what if the solution wasn’t about wrestling with ill-fitting garments but understanding why this happens in the first place?
The good news is that modern garment design has made huge strides in solving this universal parenting challenge. High-waisted baby pants, when engineered with developmental needs in mind, can stay securely in place without restricting movement or causing red marks. This isn’t about chasing fleeting trends—it’s about leveraging thoughtful design principles that align with how babies grow and move. By focusing on key structural elements and materials, you can transform dressing time from a battle into a seamless part of your routine, ensuring your baby stays comfortable, covered, and ready for every crawl, kick, and discovery. Let’s unpack exactly what makes high-waisted styles work (or fail) for your little explorer.
Top 10 High-Waisted Baby Pants
Detailed Product Reviews
1. Teach Leanbh Infant Baby 3 Pack Footed Pants Cotton High Waist Casual Leggings (3 Months, D)
Overview: This 3-pack of cotton-spandex footed pants targets newborns (0-3 months), prioritizing comfort and belly protection. Made from soft, breathable fabric with heat-seal labels, it aims to be a gentle, tag-free essential for sensitive infant skin during the early months. What Makes It Stand Out: The high-waisted design is the key innovation, effectively shielding the baby’s tummy from drafts to prevent colds—a thoughtful feature often missing in basic leggings. The elimination of external tags via heat-seal labels significantly enhances comfort, reducing irritation risks common with traditional tags. Value for Money: Offering three high-quality, seasonally versatile pieces at a mid-range price point provides solid value. While not the cheapest option, the focus on belly protection and tagless comfort justifies the cost compared to simpler, less protective single-packs. Strengths and Weaknesses: Strengths: Exceptional softness and breathability; effective high waist for warmth; tagless design prevents itching; suitable for year-round wear. Weaknesses: Sizing runs small (true to 3 months only); footed design may overheat in warm climates; limited color/style variety per pack. Bottom Line: An excellent, practical choice for newborn essentials, especially in cooler environments. The belly protection and tagless comfort make it highly recommended for 0-3 month outfits, though verify sizing carefully.
2. little planet by carter’s unisex-baby 2-pack Pants made with Organic Cotton, Blue Creek/Grey, 6 Months
Overview: This GOTS-certified organic cotton 2-pack offers unisex baby pants in a soft, neutral palette. Designed for 6-month-olds, it emphasizes ethical sourcing and gentle comfort, featuring a stylish cuff and machine-washable construction for everyday wear. What Makes It Stand Out: The Global Organic Textile Standard (GOTS) certification is the standout feature, guaranteeing rigorous environmental and social criteria throughout production. This, combined with the soft, stretchy fabric and unisex styling, appeals strongly to eco-conscious parents seeking safe, sustainable basics. Value for Money: Priced slightly above conventional cotton, the GOTS certification justifies the premium by ensuring chemical-free, ethically made garments. The 2-pack format offers better value than single organic items, though it costs more than non-certified alternatives offering similar softness. Strengths and Weaknesses: Strengths: GOTS-certified organic cotton ensures safety and sustainability; fabric is notably soft and flexible for movement; stylish cuff adds subtle detail; easy care (machine washable); unisex design extends usability. Weaknesses: Limited color/pattern options; thinner fabric may lack warmth for colder months; sizing can be inconsistent. Bottom Line: Highly recommended for parents prioritizing organic, ethical clothing. The GOTS certification and soft comfort make it a worthwhile investment for everyday baby wear, despite the modest price premium.
3. 123 Bear Infant and Toddler Soft Cotton Spandex Boys and Girls Pants Multipacks (Black 2, 12-18 Months)
Overview: This versatile 2-pack of neutral-colored pants, crafted from 95% combed cotton and 5% spandex, targets toddlers (12-18 months). It focuses on durability, comfort, and practicality with tagless labels and a pull-on elastic waistband. What Makes It Stand Out: The specific 180gsm fabric weight (5.3 oz) combined with 4-way stretch sets it apart. This provides substantial durability and shape retention without sacrificing softness—unlike lighter, sag-prone 100% cotton options—making it ideal for active toddlers needing sturdy yet flexible clothing. Value for Money: The multipack format at a competitive price delivers excellent value. The durable, shape-holding fabric ensures longevity through washes and active play, outperforming cheaper, thinner alternatives that wear out quickly, offering significant savings over time. Strengths and Weaknesses: Strengths: Superior 180gsm fabric balances softness, stretch, and long-lasting shape; tagless labels prevent irritation; versatile neutral colors work for any gender or outfit; machine washable; comfortable elastic waist. Weaknesses: No pockets limit utility; very plain design lacks visual appeal; black color may show lint/pilling. Bottom Line: A top pick for practical, durable toddler basics. The robust fabric and tagless comfort make it a smart, cost-effective choice for daily wear, especially for parents valuing longevity over style.
4. Simple Joys Baby Girl’s 4 pack pant Pants, Pink/Grey/Navy Ruffle, 6-9 Months
Overview: This value-focused 4-pack offers stylish ruffle-hemmed pants in assorted colors and playful prints (florals, stripes, polka dots) for baby girls aged 6-9 months. It combines fashion-forward details with everyday comfort using soft, breathable fabric. What Makes It Stand Out: The generous 4-pack with diverse, colorful prints provides exceptional variety, allowing endless mix-and-match possibilities. The added ruffle detail elevates it beyond basic leggings, offering a “put-together” look effortlessly—perfect for parents wanting cute, ready-to-go outfits. Value for Money: The 4-pack format delivers outstanding value, spreading the cost across multiple unique styles. While slightly pricier per unit than plain multipacks, the fashion details and print variety justify the cost by reducing the need for additional decorative items. Strengths and Weaknesses: Strengths: High variety with 4 distinct prints/colors; attractive ruffle detail adds style; soft, comfortable fabric; snug ankle cuffs prevent slipping; easy to pair with tops. Weaknesses: Ruffles may irritate sensitive skin; prints can fade faster with washing; limited to girl-specific styling; fabric may pill. Bottom Line: Highly recommended for parents seeking affordable style and variety. The mix of prints and ruffles makes dressing easy and fun, offering excellent bang for buck for casual or dressy baby outfits.
5. PAUBOLI Baby Long Bloomers Soft Cotton Harem Pants for Boys Girls 12M-7T (US, Age, 12 Months, 18 Months, Beige)
Overview: These unisex cotton-spandex harem bloomers cater to a wide age range (12 months to 7 years) in a neutral beige. Featuring a relaxed fit and elastic waist, they prioritize breathability, freedom of movement, and practical sun/mosquito protection for warm-weather play. What Makes It Stand Out: The dual functionality for sun and mosquito protection during summer sets these apart. The loose, airy harem silhouette isn’t just stylish—it actively shields delicate skin from elements while ensuring exceptional comfort and unrestricted movement, a unique practical benefit. Value for Money: The extended sizing (12M-7T) offers remarkable long-term value, growing significantly with the child. Combined with the specialized summer protection and durable fabric, it outperforms single-season basics, making the price highly reasonable for versatile, multi-year use. Strengths and Weaknesses: Strengths: Effective sun/mosquito barrier; super soft, breathable, and lightweight fabric; generous sizing range; easy elastic waist; unisex appeal; machine washable. Weaknesses: Loose fit may not suit all styles; beige shows stains easily; limited color options; less warmth for cooler days. Bottom Line: An essential summer staple for active toddlers/kids. The protective harem design and wide sizing provide exceptional practicality and value, making it a top recommendation for warm-weather wardrobes.
6. Butterblu Fallon 3-Pack Footed Pants 100% Organic Cotton Bottoms for Baby Boys & Girls, Sorbet, Newborn
Overview: These newborn footed pants offer a soft, practical solution for sensitive skin, made entirely from GOTS-certified organic cotton in a cheerful 3-pack. Designed for comfort and ease during frequent changes, they cater to preemie up to 9-month sizes.
What Makes It Stand Out: The standout feature is the rigorous GOTS organic certification, ensuring chemical-free fabric ideal for delicate skin. The coordinated “Sorbet” color palette and thoughtful elastic waistband simplify dressing, while the machine-washable fabric resists fading and shrinking.
Value for Money: Priced competitively for organic essentials, the 3-pack provides better value than single-pair alternatives. The durability and fade resistance justify the cost, especially compared to non-organic options that may require more frequent replacement.
Strengths and Weaknesses: Strengths: Exceptional softness, true organic integrity, color-coordinated versatility, and easy care. Weaknesses: Limited size range (max 9 months), and the footed design may overheat babies in warm climates.
Bottom Line: Highly recommended for eco-conscious parents prioritizing certified organic materials and convenience; ideal for newborn essentials or gifting, though climate suitability should be considered.
7. Gerber Baby Girls Multi-Pack Active Pants Set, Pink/Black/Gray, 3-6 Months
Overview: This 4-pack of active pants delivers basic, comfortable wear for infant girls, featuring soft cotton rib fabric and a mid-rise silhouette suited for the 3-6 month stage. It focuses on everyday functionality without frills.
What Makes It Stand Out: The covered elastic waistband is a key differentiator, preventing roll-down and ensuring a secure, irritation-free fit. The multi-color pack (pink, black, gray) offers immediate outfit variety, while the cotton rib material provides gentle stretch.
Value for Money: Excellent value for a 4-pack at an accessible price point. The durable cotton rib withstands frequent washing, outperforming cheaper single-pair pants that lose shape quickly, making it a budget-friendly wardrobe staple.
Strengths and Weaknesses: Strengths: Affordable multi-pack, comfortable covered waistband, color variety, and machine-washable durability. Weaknesses: Limited to girls’ styles, lacks organic certification, and the rib fabric may pill over time with heavy use.
Bottom Line: A practical, cost-effective choice for parents seeking no-fuss, comfortable everyday pants; best for casual wear but not ideal for those prioritizing eco-materials.
8. Simple Joys by Carter’s Baby Boys’ 4-Pack Cotton Pants
Overview: This 4-pack offers versatile cotton pants designed as gender-neutral basics, featuring tagless comfort and multiple prints/patterns suitable for infants. It emphasizes value and everyday usability for active babies.
What Makes It Stand Out: The unisex design with varied prints breaks gender norms, while the tagless labeling eliminates scratchy seams—a major comfort upgrade. The pack’s focus on gifting appeal (baby showers, registries) and consistent sizing enhances its practicality.
Value for Money: Outstanding value with four quality pants in one set. The tagless construction and durable cotton justify the price, outshining single-pair alternatives and reducing long-term costs through longevity.
Strengths and Weaknesses: Strengths: True unisex versatility, itch-free tagless design, high pack value, and reliable fit for movement. Weaknesses: Prints may not appeal to all, and cotton fabric lacks significant stretch compared to blended alternatives.
Bottom Line: Highly recommended for parents seeking affordable, comfortable, and inclusive basics; perfect for building a foundational wardrobe or gifting, though stretch enthusiasts may prefer alternatives.
9. Amazon Essentials Unisex Babies’ Cotton Pull-On Pants, Pack of 3, Black/Light Grey Heather/Stripe, 6-9 Months
Overview: A 3-pack of minimalist pull-on pants crafted from 100% cotton interlock knit, designed for unisex comfort in 6-9 month sizes. It prioritizes breathable fabric and effortless dressing with a clean, modern aesthetic.
What Makes It Stand Out: The lightweight interlock knit fabric provides natural stretch and breathability year-round, a rarity in basic cotton pants. The cohesive color/print coordination (black, grey heather, stripe) ensures easy matching with other Amazon Essentials pieces.
Value for Money: Strong value for a 3-pack of premium-feel cotton. The fabric’s durability and fade resistance surpass cheaper knits, while Amazon’s pricing undercuts comparable organic brands without sacrificing quality.
Strengths and Weaknesses: Strengths: Superior breathable fabric, seamless unisex styling, elastic waist ease, and color-coordinated versatility. Weaknesses: Limited size/color options, and lacks organic certification for eco-focused buyers.
Bottom Line: Ideal for parents wanting affordable, high-comfort basics with modern style; excellent for layering but not for those requiring certified organic materials.
10. Touched by Nature Unisex Baby Organic Cotton Pants, Black Floral, 9-12 Months
Overview: This organic cotton pants set combines black floral and solid patterns in a unisex 9-12 month size, emphasizing eco-friendly comfort and coordinated outfit potential for toddlers.
What Makes It Stand Out: The unique black floral print offers a stylish alternative to typical baby prints, while the GOTS-certified organic cotton ensures gentle, chemical-free fabric. The set’s focus on mix-and-match solids/florals simplifies dressing.
Value for Money: Fair value for certified organic cotton, though pricier than non-organic packs. The machine-washable durability and distinctive design justify the cost for eco-conscious shoppers seeking aesthetic variety.
Strengths and Weaknesses: Strengths: Certified organic material, attractive floral print, softness for sensitive skin, and easy care. Weaknesses: Small pack size (implied single set), limited print/color range, and potential for floral patterns to show stains.
Bottom Line: Recommended for parents prioritizing organic fabrics and unique style; great for special occasions but less practical for heavy daily use due to the print’s visibility of wear.
Why Baby Pants Slip Off: The Hidden Physics
Understanding the mechanics behind slipping pants is the first step to solving the problem. Babies aren’t just small adults—their proportions and movements create unique challenges for clothing retention.
The Torso-to-Leg Ratio Dilemma
Newborns and infants have disproportionately long torsos compared to their legs, meaning standard waistbands sit too low on their shorter leg sections. As they grow rapidly, this imbalance shifts, causing pants designed for one stage to fail at the next. High-waisted cuts counter this by positioning the waistband higher on the ribcage where the body narrows, creating natural anchoring points that resist downward pull during kicking or sitting.
Movement vs. Gravity Dynamics
Babies spend significant time in positions that fight gravity—lying on backs, sitting upright, or rocking on all fours. Each movement creates subtle forces: kicking generates downward thrust, sitting compresses the waistband, and rolling shifts fabric tension. Pants without strategic elasticity or secure closures can’t counteract these forces, leading to gradual slippage that culminates in full drops.
Diaper Bulk: The Unseen Culprit
Modern diapers, especially overnight or larger sizes, add significant circumference below the natural waistline. When pants are sized for the baby’s body alone, the diaper creates a “step” where fabric catches and slides down. High-waisted designs account for this by extending coverage over the diaper’s top edge, distributing pressure evenly rather than concentrating it at a single fold line.
Decoding Waistband Engineering
Not all high-waisted pants function equally—the devil’s in the construction details. What looks like a simple band involves precise material science and ergonomic planning.
Elastic Integration Techniques
The placement and type of elastic determine whether a waistband grips securely or digs in painfully. Seamless interior elastic (where the band folds inward) prevents chafing while maintaining consistent pressure. Look for graduated tension—firmer at the sides for stability, softer at the back for comfort during sitting. Avoid single-thick elastic bands that create pressure points; dual-layer systems with memory retention perform better long-term.
The Critical Width Factor
Waistband width directly impacts stability. Bands narrower than 1.5 inches lack surface area to grip effectively, while overly wide bands (over 3 inches) can fold or roll down. The sweet spot—2 to 2.5 inches—provides enough contact with the baby’s skin to stay put without restricting breathing or movement, especially crucial during tummy time.
Memory Fabric Technology
Fabrics with inherent “memory” (like certain polyester-cotton blends with spandex) retain their shape after stretching. Unlike basic knits that permanently loosen, these materials rebound to original dimensions wash after wash. This is non-negotiable for longevity—babies outgrow pants fast, but you need them to perform reliably throughout their wear cycle.
Fabric Science for All-Day Security
Material choice affects everything from grip to comfort. The right fabric works with your baby’s body, not against it.
Knit Weave Density Matters
Loose knits may feel soft initially but stretch out quickly under diaper weight. Medium to tight jersey knits or interlock weaves maintain structural integrity while allowing necessary give. Test by gently stretching a swatch—if it doesn’t spring back within 3 seconds, it’ll sag prematurely on your baby.
Moisture-Wicking Base Layers
Sweat reduces friction between skin and fabric, accelerating slippage. Fabrics with moisture management (like bamboo-rayon blends) keep the waistband interface dry, preserving grip. This is especially vital for active crawlers or babies prone to overheating.
Textured Interior Surfaces
Smooth linings slide easily over onesies. Subtle interior textures—achieved through brushed finishes, micro-ribbing, or silicone dot patterns—increase friction without irritation. Run your finger along the inside; it should have slight tactile resistance, not feel like satin.
Stretch Directionality
Four-way stretch fabric (expanding horizontally and vertically) accommodates growth spurts and movement without distorting the waistband. Two-way stretch (only horizontal) often pulls down when babies arch their backs. Check labels for “4-way” specifications or test by pulling diagonally.
Closure Systems That Stand Up to Toddler Tactics
Zippers and snaps aren’t just for decoration—they’re security systems. How closures integrate with the waistband makes or breaks retention.
Hidden Snap Panels: The Invisible Anchor
Discreet snap closures within the waistband (not at the sides) allow adjustable tightness without bulk. Positioned at the back or front, they let you customize fit as diapers change size. Crucially, they prevent the “accordion effect” where elastic alone bunches when tightened.
Zipper Guard Innovations
Standard zippers can slide down unintentionally. Look for auto-lock sliders or magnetic stops that hold position until deliberately released. Paired with fabric garage covers, these prevent skin snags while maintaining closure integrity during vigorous movement.
Adjustable Drawcord Mechanics
Drawcords seem ideal but often fail due to poor execution. Effective versions use flat, non-roll cords housed in wide tunnels, with toggles positioned outside the waistband to avoid pressing into skin. The cord should tighten in a full circle—not just at front—to distribute pressure evenly.
Sizing Secrets Beyond the Label
Baby size charts lie. Actual fit depends on developmental milestones, not just weight or age.
The Diaper Size Multiplier
Your baby’s current diaper size directly impacts required pant dimensions. Size 3 diapers add ~1.5 inches to waist circumference versus size 1. Always size up in pants if using bulky diapers—better to adjust the waistband than have constant rolling. Measure over the diaper for accuracy.
Growth Spurt Buffer Zones
High-waisted pants should accommodate 1-2 months of growth. Key indicators: waistbands with 1-2 inches of adjustable overlap (via snaps or folds) and inseams 0.5 inches longer than current leg length. Avoid “perfect fit” claims—they’ll be too tight within weeks.
Body Shape Variations
Some babies have deeper torsos or fuller thighs. If pants slip despite correct size, check if the crotch curve is too shallow (causing upward pull) or waist height too low (sitting on hip bones). Curved-rise patterns solve this by following natural body contours.
Developmental Stage Considerations
A newborn’s needs differ vastly from a toddler’s—design must evolve with mobility.
Pre-Crawler Stability Features
For non-mobile babies, focus on soft, wide bands that won’t crease delicate skin. Seamless construction prevents pressure marks during constant lying positions. Avoid bulky closures that could discomfort when swaddled.
Crawler-Proof Reinforcements
Active movers need reinforced side seams and gusseted crotches to handle squatting and kicking. Waistbands should sit higher (at or above belly button) to counteract the forward-leaning posture of crawling, where gravity constantly tugs pants downward.
Toddler-Tested Adjustability
Independent walkers require easy-on/easy-off features for potty training. Drop-crotch styles with full-coverage waistbands allow quick access without full removal. Look for stretchy side panels that accommodate training pants while maintaining grip.
Washing and Wear Longevity
Even brilliant design fails with improper care. Fabric degradation is the silent slippage accelerator.
Elastic Preservation Protocols
Hot water and dryers are elastic killers. Always wash in cold water on gentle cycle, and air-dry waistband-up to prevent stretching. If machine drying, use the lowest heat setting and remove while slightly damp—never bone-dry.
Fabric Softener Fallacy
While tempting for comfort, liquid softeners coat elastic fibers, reducing grip. Opt for wool dryer balls instead. For scratchy seams, use a vinegar rinse (1/4 cup white vinegar in final rinse cycle) to soften without residue.
Seasonal Adaptation Strategies
Temperature changes affect both baby’s body and fabric behavior.
Summer Slip Prevention
Heat increases sweating, reducing skin-to-fabric friction. Choose lightweight, breathable fabrics with moisture-wicking properties. Higher rise (covering lower ribs) provides more dry surface area for grip. Avoid cotton-heavy blends that lose elasticity when damp.
Winter Layering Compatibility
Thick layers underneath can push pants down. Prioritize pants with deep, flexible waistbands that accommodate thermal wear without constriction. Fleece-lined interiors actually improve grip—they’re less slippery than smooth knits against long johns.
Ethical Manufacturing Indicators
Durability isn’t just about your baby—it’s about sustainability.
Reinforced Stress Point Signatures
Check interior seams at crotch and waist junctions. Double-stitching or overlock edging prevents unraveling after repeated stretching. Weak seams cause premature sagging, forcing you to replace pants sooner.
Eco-Friendly Elastic Choices
Traditional elastic contains petroleum-based rubbers that degrade quickly. OEKO-TEX certified elastic with natural rubber cores maintains tension longer and breaks down more safely in landfills. Look for garment tags specifying “eco-elastic.”
Real-World Testing Red Flags
Don’t rely on marketing claims—inspect before buying.
The Stretch Test
Pull the waistband outward firmly. It should extend to 1.5x its resting width and snap back within 2 seconds. If it sags or feels stiff, it won’t adapt to movement.
The Roll Test
Pinch the waistband and roll it toward the baby’s back. Quality bands roll smoothly without bunching or twisting. Uneven rolling indicates poor elastic distribution, leading to inconsistent pressure.
The Diaper Simulation
Place a folded cloth (mimicking diaper bulk) inside the waistband and gently shake the pants. Secure designs hold position; flawed ones slide down immediately. This mimics real-world diaper pressure.
Investment Value Calculation
Evaluate beyond the price tag to determine true cost per wear.
Growth-Forward Design Elements
Pants with fold-over waistbands or adjustable snaps offer extended wear. Calculate usable months: if adjustable for 3 sizes, divide cost by 12+ weeks versus non-adjustable styles lasting 4 weeks. High-waisted styles often deliver 2-3x the wear period.
Repairability Assessment
Check if seams are accessible for mending. Flat-felled seams can be reinforced when stretched; blind-stitched hems often can’t. A slightly pricier pair that’s repairable beats cheaper, disposable options.
Frequently Asked Questions
What makes high-waisted pants stay up better than regular waistbands?
High-waisted designs anchor higher on the ribcage where the baby’s torso naturally narrows, creating a stable foundation that resists downward pull from diaper bulk and movement. They distribute pressure over a wider area compared to standard waistbands that sit on the hips.
How tight should the waistband feel for security without discomfort?
You should comfortably fit two adult fingers between the band and baby’s skin. It should feel snug but not leave indentations. Proper high-waisted bands use graduated tension—firmer at sides for grip, softer at back for sitting comfort.
Do I need special pants for overnight with bulky diapers?
Yes—look for styles with extra-wide, non-roll waistbands that extend 1-2 inches above the diaper’s top edge. Seamless interior construction prevents pressure points during long wear, and moisture-wicking fabrics keep the waistband dry for consistent grip.
Can I make existing pants stay up by folding the waistband?
Temporary fixes like folding can work short-term but often create uncomfortable ridges. Proper high-waisted designs integrate adjustability through hidden snaps or stretch panels that maintain even pressure without constriction.
Why do some “stay-up” pants still slide during crawling?
This usually indicates insufficient rise (crotch depth). Crawlers need pants with deeper rises that position the waistband above the belly button, preventing the forward-leaning posture from tugging fabric downward. Check for gusseted crotches that allow full range of motion.
Are certain fabrics better for preventing slippage?
Medium-density knits with 4-way stretch and moisture-wicking properties outperform basic cotton. Fabrics with subtle interior textures (like brushed finishes) increase skin friction. Avoid slippery satins or overly loose weaves that lose tension quickly.
How often should I replace high-waisted pants for optimal performance?
Replace when elastic loses rebound (takes >3 seconds to snap back) or waistbands permanently stretch beyond 1.5x original size. Typically this occurs after 3-5 months of regular wear, depending on washing methods and activity level.
Do higher-priced pants always stay up better?
Not necessarily—price often reflects branding, not engineering. Focus on specific features: graduated elastic, 2-2.5 inch band width, and reinforced stress points. Many mid-range options outperform luxury brands through smarter construction.
Can I resize pants as my baby grows?
Look for styles with adjustable elements like fold-over waistbands, snap panels, or side stretch gussets. These allow incremental sizing up while maintaining secure fit. Avoid permanent alterations that compromise structural integrity.
Should I size up for high-waisted styles to accommodate diapers?
Size based on measurements over the current diaper size. If using bulky diapers, choose pants one size up from clothing charts but verify waistband adjustability—many high-waisted designs include extra room specifically for diaper bulk.