Nappy Sizing Guide

 

Nappy Size Guide NZ: Find the Perfect Fit for Your Baby

Choosing the right nappy size plays a big role in your baby’s comfort, sleep quality, and leak protection. As babies grow quickly during their first few years, their diaper needs can change more often than many parents expect. A well-fitted nappy helps prevent leaks, red marks, diaper rash, and discomfort while allowing your little one to move freely throughout the day.

Our easy nappy size guide helps New Zealand parents choose the best fit based on baby weight, growth stage, and everyday comfort. Whether you’re shopping for newborn nappies, toddler nappies, or nappy pants for active little ones, understanding diaper sizing can make every nappy change easier and more comfortable.

Use the chart below to explore recommended nappy sizes, average daily usage, and guidance on when your baby may be ready to move up to the next size.

Nappy Size Chart

Kiddicare Nappy Milestone Baby Weight in KG Average Number of Nappies a day How long your little one may need this size
Newborn Nappy Up to 5kg 6-8/day first few weeks at most
Infant Nappy 4-7kg 7-8/day up to 5 months
CrawlerNappy 6-11kg 6-7/day up to 14 months
Toddler Nappy 10-14kg 5-6/day up to 30 months
Walker Nappy 13-18kg 4-5/day up tp 30 months
Junior Nappy 16kg+ As needed up to 30 months
Toddler Pants 10-14kg 6/day 2+ years old
Walker Pants 13-18kg 4-5/day 3-4 years old
Junior Pants 16kg+ As needed 4+ years old

How to Choose the Right Nappy Size

Finding the right diaper fit is about more than just weight. Every baby grows differently, and factors like body shape, movement, and absorbency needs can affect which size works best. 

A properly fitted nappy should:

  • Fit snugly around the waist without feeling tight
  • Sit comfortably around the thighs without leaving deep marks
  • Prevent leaks and diaper blowouts
  • Allow your baby to move freely and comfortably

If you notice leaks, gaps around the legs, or difficulty fastening the tabs, it may be time to move up to the next size.