How to Read Diaper Size Charts for Toddlers
By Honest Baby and Beauty Company | The Honest Company | Published: 2026-10-20
Category: How-to Guides
Learn how to read diaper size charts for toddlers, including when to size up to size 6 or size 7 diapers. Get practical fit checks and avoid common mistakes.
Quick answer
To read a diaper size chart for toddlers, focus on your child's weight and fit signs like red marks or leaks, rather than age. Size 6 and size 7 diapers are designed for older toddlers, and the right size keeps your child comfortable and dry.
Why weight matters more than age for toddler diaper sizes
Diaper size charts list weight ranges, not age, because toddlers grow at different rates. A 2-year-old might need size 5 while another needs size 6. Always check the weight range on the package, not the age label. For example, size 6 diapers typically fit toddlers 35 pounds and up, while size 7 diapers are for extra-large toddlers or overnight use.
Common fit problems and when to size up
Even if your toddler falls within the weight range, fit issues can happen. Look for red marks on the waist or thighs, leaks, or the diaper riding low. If you see these signs, try the next size up. Also, active toddlers who crawl or walk may need a larger size for better coverage and leak protection.
Step-by-step guide to reading diaper size charts for toddlers
- Check the weight range on the package: Find the weight range printed on the diaper package (e.g., 35+ lbs for size 6). Ignore age labels; go by your toddler's current weight. Common mistake: relying on age instead of weight. A 2-year-old may need size 6 even if the chart says 18 months.
- Assess fit with the two-finger test: After fastening the diaper, slide two fingers under the waistband. If it's too tight or too loose, adjust the tabs or try the next size. If you can't fit two fingers, size up. If the waistband gaps, size down.
- Look for red marks or leaks after wear: Check your toddler's waist and thighs for red indentations. Also note any leaks, especially overnight. Both are signs the diaper is too small. Leaks often mean the diaper is too small, not that the absorbency is low.
- Consider activity level and body shape: Active toddlers who crawl, walk, or climb may need a larger size for better coverage. Also, toddlers with chunky thighs or round bellies might need size 7 even if weight suggests size 6. Size 7 diapers like Honest Clean Conscious Diaper® Pattern Play offer extra room for active toddlers.
- Test the next size if in doubt: If you're between sizes, buy a small pack of the next size up and try it for a day. Compare fit, leaks, and comfort before committing. It's better to use a slightly larger diaper than one that's too tight.
Diapers that fit your toddler well
- Honest Clean Conscious Diaper®, Pattern Play, Size 7: Honest Clean Conscious Diaper® Pattern Play, Size 7 delivers up to 100% leak protection with Comfort Dry Technology. Size 7 is ideal for older toddlers or heavy wetters, giving extra room and leak protection without needing to size up prematurely.
Honest Clean Conscious Diaper®, Pattern Play, Size 7 - Honest Clean Conscious Diaper®, It's A Paw-ty, Size 6: Honest Clean Conscious Diaper® It's A Paw-ty, Size 6 is OEKO-TEX® STANDARD 100 Certified, tested for 350 harmful chemicals. Size 6 fits most toddlers from 35 pounds, and the certification adds peace of mind for sensitive skin.
Honest Clean Conscious Diaper®, It's A Paw-ty, Size 6
