When to Size Up Diapers

4 Min Read
When to Size Up Diapers

Children grow out of diapers almost as fast as they grow out of clothes, so their sizes will change frequently. 

Not sure when to size up your little ones diapers or wonder how diaper sizes work? We're here to help you through it.

How Diaper Sizes Work

It's essential to keep in mind that age is one of many factors to consider when determining your baby's diaper size since most brands go by weight. 

Every brand's size chart will vary slightly, but here's our size chart for reference:

Bamboo Diapers

 Size Weight # Per Box
NB < 10 lbs 192
1 8 - 14 lbs 180
2 12 - 18 lbs 168
3 16 - 28 lbs 144
4 22 - 37 lbs 132
5 27+ lbs 120
6 35 + lbs 108

Bamboo Training Diapers (Diaper Pants)

 Size Weight # Per Box
2T-3T < 34 lbs 156
3T-4T 32- 40 lbs 132
4T-5T 38+ lbs 108

How to Get the Right Fit

There are three easy tricks to knowing if you've found your child's perfect fit:

  1. The diaper's waistband should sit just under your little one's belly button
  2. The leg cuffs shouldn't have any gaps. Once the diaper is on, run two fingers around the inside of the cuffs to remove any gaps that can cause leaks.
  3. When fastening a diaper, you should be able to fit two fingers under the waistband comfortably, indicating whether it's too snug or too loose. 

Telltale Signs Your Little One May Be Growing Out of Their Diapers 

Here's what to look out for when it's time to size up: 

  • Fastening tapes don't reach the center of the waistband
  • Can't comfortably fit two fingers under the waistband
  • Red marks on your baby's tummy or thighs
  • Diaper rash
  • Signs of fussiness, general discomfort
  • Leaks or blowouts

Key Takeaways

Overall, it's not difficult to tell when your baby needs to move up a size in diapers. To ensure they're as comfortable as possible in their proper size, try hypoallergenic and dermatologist-tested nappies.