The ultimate nappy size guide

nappy sizes compared
17 July 2023

The ultimate nappy size guide

Parents and caregivers don't always know what the right nappy size for their child will be. But with so many options and sizes available, you want to make sure you get it just right so they're comfortable and don't make a mess.

Let’s take a look at the different nappy sizes available, why the right size matters, and other things to consider so you can get it right the first time.

Why nappy sizes matter

When choosing the right nappy size for your little one, you want to keep their comfort and well-being, as well as the best leakage protection, in mind.

If your little one is wearing an undersized nappy, it could be too tight and restrict their movement. This can cause unnecessary discomfort and even lead to skin irritation from chafing.

On the other hand, a loose nappy can not only result in leaks, but also in discomfort and irritation from excessive movement and rubbing.

Understanding nappy sizing

As confusing as it can be for new parents and caregivers, there are luckily a number of nappy sizing systems that can help you find the right fit for your child.

Weight-based sizing

Weight-based sizing is one of the most straightforward and widely used methods of sizing nappies. It categorises nappy sizes based on babies' weight ranges.

Though it may not fully reflect your child's body shape or proportions, this is still handy because it is practical and easy to measure.

Age-based sizing

Another commonly used system is age-based sizing, which simply includes labels for:

  • Newborn
  • Infant
  • Toddler
  • Junior

This serves as a rough guideline depending on your child's age and is especially helpful during this time of quick growth and development.

Waist measurement

If you're looking for a more accurate fit, some nappy brands offer sizing options based on specific waist measurements. This is especially helpful if your child's body proportions aren't typical for their age or size.

Combination sizing

If you're still unsure which system to use and don't want to waste money on the potentially wrong one, you could even consider a combination sizing system.

This combines all three above to offer a more accurate and in-depth fit.

Which should you use?

Weight-based sizing is generally the most reliable for infant nappy sizes, while age-based sizing tends to work better for toddlers and older children.

And if your child's body is different from what could be seen as "average", then there are always waist and combination size guides to consider, too.

Finding the right size for your child's nappy

If you’re wanting to find the perfect size for your child’s nappy through their hip and waist measurement, follow these step-by-step instructions to measure your child accurately.

  • Take your child's waist circumference by using a tape. Have them stand up straight, wrap the tape around their waist just above the hip bones—snug but not too tight—and note the number.
  • Measure the hip circumference. With the tape, wrap it around your child’s hips, around the buttocks.

For their weight, simply pop them on the scales and find the nappies that most closely match.

Tips and tricks

  • Measure when your child is wearing lightweight clothing for the most accurate results.
  • Take measurements at different times of the day to account for when they've eaten and drunk.
  • If your child is between sizes, choose the larger size to accommodate their growth and to keep leakage risks to a minimum.

What else should you keep in mind when finding the perfect nappy?

When you're choosing the right nappy for your baby, there are some other important factors to consider beyond basic sizing measurements.

  • Absorbency - This is important for managing any accidents throughout the day.
  • Flexibility - You'll want a flexible waistband to make sure the nappy is a snug fit and provides a gentle, secure grip around the waist.
  • Leg cuffs - These are designed to create an extra barrier against leaks, especially when they're more active and mobile.

Reusable vs. disposable nappies

When choosing the right nappy, you might be trying to decide between reusable nappies and disposable nappies. Both options have their benefits:

  • Reusable nappies - Reusable nappies come in a range of styles and sizes and are an economical, sustainable choice that can be washed and reused multiple times.
  • Disposable nappies - A disposable nappy is convenient and easy to use, especially when you’re on the go. They provide excellent absorbency and can keep your child dry for long periods.

Find the perfect nappy size for your child with Incontinence UK

So we know the different nappy sizes and why getting the right fit for your child is so important. Now all that’s left is to get yourself some high-quality, reliable nappies from Incontinence UK.

We stock a wide range of nappies of all sizes at better than supermarket prices, so your child and your wallet will be happy.

With a range of premium brands, fast, discreet delivery, and 10% extra savings when you subscribe, there’s no reason not to get your nappies from Incontinence UK!