Size + Fit Guide
Find the fit that keeps leaks away.
The wrong size is the leading cause of leaks. Use the guide below to find the right fit for your baby, then match it to Tape or Pants.
Size finder
What does your baby weigh?
Enter their weight and we'll match the size — no chart reading needed.
How to check the fit.
Waist position.
The waistband should sit snug right below the belly button. Not too high, not too low.
No gaps.
Run a finger around the legs and waist. It should feel snug but not tight. No visible gaps when your baby moves.
The finger test.
You should be able to fit one finger between the waistband and your baby's skin. Two fingers means it's too loose.
Cozy Diapers (tape).
For newborns and babies who aren't crawling yet. Side tabs for easy lying-down changes.
| Size | Weight | Age |
|---|---|---|
| NB | under 5 kg | 0–1 mo |
| S | 4–8 kg | 1–3 mo |
Cozy Pants (pull-up).
For active toddlers on the move. Pull them on standing up, tear them off for changes.
| Size | Weight | Age |
|---|---|---|
| M | 7–12 kg | 3–9 mo |
| L | 9–14 kg | 9–18 mo |
| XL | 12–17 kg | 18–30 mo |
| XXL | 15+ kg | 2 yr+ |
When to move up a size.
- Red marks on your baby's thighs or waist after wearing.
- Frequent leaks that didn't happen before at this size.
- The diaper looks visibly small or stretched when fastened.
- Your baby is near the top of the weight range for the current size.