Best Nappies in NZ: How to Choose the Right Nappy for Your Baby

Choosing the best nappies for your baby can take some trial and error. The right nappy depends on your baby’s size, body shape, age, how heavily they wet, and whether you need nappies for daytime, overnight use or an active toddler.

There isn’t one nappy that is automatically “best” for every baby. A good nappy should fit comfortably, absorb well, help prevent leaks and offer good value for your family.

In this guide, we’ll look at what to consider when choosing nappies in New Zealand, including fit, absorbency, sizing, overnight protection, nappy pants and value for money.

What Makes a Good Nappy?

The best nappy is one that fits your baby well and performs reliably for the way you use it. When comparing nappies, these are some of the most important things to look at:

• Fit: A nappy should sit snugly around the waist and legs without leaving deep marks or allowing gaps where leaks can escape.

• Absorbency: Good absorbency helps keep moisture away from the skin and reduces the chance of leaks, especially during naps and overnight.

• Sizing: Choosing the right size is important. Weight ranges are a useful guide, but babies of the same weight can have very different body shapes.

• Comfort and softness: Soft materials and a comfortable fit can make a noticeable difference, particularly for babies wearing nappies all day and night.

• Leak protection: Leg cuffs, waist fit and the absorbent core all work together to help contain urine and bowel movements.

• Value for money: The cheapest nappy per piece is not always the best value if you need to change it more often or experience frequent leaks.

If you are getting regular leaks, red marks around the legs or waist, or the fastening tabs are becoming difficult to close, it may be time to try a different size or fit.

Which Nappies Are Best for Newborns?

For newborns, fit is especially important because even a highly absorbent nappy can leak if it is too loose around the legs or waist.

Look for a newborn nappy that:

• fits securely around small legs and waist

• feels soft against delicate skin

• absorbs quickly

• has reliable leak guards

• is easy to fasten and adjust

Premature or very small babies may need a smaller specialist nappy rather than a standard newborn size.

Babyonline stocks nappies for babies from premature sizes through to larger infant and toddler sizes, so parents can move through the size range as their baby grows.

Which Nappies Are Best for Overnight?

For overnight use, absorbency and fit become even more important because the nappy needs to cope with a longer period between changes.

If your baby regularly wakes with a very full nappy or you are experiencing overnight leaks, look for a nappy with strong absorbency and a secure fit around the legs and waist.

Before changing brands, also check whether your baby may be ready for the next size up. A larger nappy can sometimes provide more absorbent capacity and a better overnight fit, even when your baby still falls within the weight range of the smaller size.

For heavier wetters, it can be useful to compare a few different nappies because performance can vary depending on your baby’s body shape and sleeping position.

Nappies or Nappy Pants: Which Is Better?

Traditional tab-style nappies are usually the easiest option for babies, especially when they are still spending a lot of time lying down for changes.

Nappy pants can become more convenient once a baby is crawling, standing or becoming difficult to keep still during nappy changes. They pull on like underwear and are often easier to use with active toddlers.

Neither style is automatically better. The best choice depends on your child’s age, activity level and what is easiest for your family.

Some parents use regular nappies at home or overnight and nappy pants during the day, while others move almost completely to pants once their child becomes more active.

Are More Expensive Nappies Better?

Not necessarily. A higher price does not automatically mean a nappy will fit your baby better or prevent more leaks.

The better way to compare nappies is to look at:

• how well they fit your baby

• how often leaks happen

• how long they stay comfortable between changes

• whether they work well overnight

• the cost per nappy

• whether you need to use more nappies because of poor absorbency or fit

A lower-cost nappy that fits well and performs reliably can offer better value than a more expensive option that does not suit your baby.

It is often worth trying a smaller pack first when changing brands or sizes, especially if your baby is between sizes or you are unsure about the fit.

How Do I Choose the Right Nappy Size?

Start with the weight range shown on the nappy pack, but treat it as a guide rather than a strict rule.

You may need to move up a size if:

• the nappy leaves deep marks around the waist or legs

• the fastening tabs are becoming difficult to close

• you are getting frequent leaks or blowouts

• the nappy looks too short through the rise

• your baby regularly soaks through the nappy overnight

If the nappy is gaping around the legs or waist, it may be too large or simply the wrong shape for your baby.

Babies often fit two neighbouring sizes at the same time, so body shape and fit can matter just as much as weight.

How Many Nappies Does a Baby Use Per Day?

The number of nappies a baby uses varies with age, feeding and how often they need changing.

As a general guide:

• Newborn to 1 month: around 8–12 nappies per day

• 1–5 months: around 6–8 nappies per day

• 6–12 months: around 5–7 nappies per day

• 12 months and older: around 4–6 nappies per day

Newborns usually need more frequent changes because they feed often and may have several bowel movements each day.

It is a good idea to keep enough nappies on hand for several days, but avoid buying too many cartons of one newborn size before you know how quickly your baby will grow into the next size.

How Long Will My Baby Stay in Each Nappy Size?

How long a baby stays in each nappy size varies considerably depending on birth weight, growth rate and body shape. The weight range on the pack is usually more useful than age alone.

Age-based nappy sizing below is only a rough guide, as babies grow at very different rates. This is especially relevant in New Zealand’s diverse population, where average birth size and growth patterns can vary between ethnic groups. Pacific babies tend to have a higher average birthweight, while Māori and Pacific babies may also be larger during early infancy than European or Asian babies. This means some babies may move into larger nappy sizes earlier or skip the newborn size altogether, while others may remain in smaller sizes for longer. Always choose the size that gives your baby the best fit around the waist and legs.

As a rough guide:

• Premature / Tiny: usually used for premature or very small newborns, depending on birth weight
• Newborn: generally birth to around 1–2 months, although larger babies may use this size only briefly or skip it altogether
• Size 2: roughly birth/first few weeks to around 3 months
• Size 3: roughly 2–7 months
• Size 4: roughly 5–14 months
• Size 5: roughly 10 months to 2 years
• Size 6: commonly from around 18 months through the toddler years
• Size 7 and larger: generally for larger toddlers and older children, depending on the brand and child

Babies can move into the next size earlier or later, and it is normal for two neighbouring nappy sizes to fit at the same time.

If you are buying nappies in bulk, it is usually safer to stock up more heavily once your baby reaches the larger sizes, as babies generally stay in those sizes for longer than newborn sizes.

When Should I Move Up a Nappy Size?

You do not need to wait until your baby reaches the maximum weight printed on the pack before moving up a size.

It may be time to size up if:

• leaks are becoming more frequent

• the nappy leaves deep marks around the legs or waist

• the tabs no longer fasten comfortably

• the nappy looks too short through the rise

• your baby regularly wakes with a very full or leaking nappy

• bowel movements are escaping up the back or around the legs

If the next size looks slightly roomy but gives a better fit around the waist and legs, it may still work better.

Nappy weight ranges often overlap, so it is normal for a baby to fit two sizes at the same time.

So, What Are the Best Nappies in NZ?

There is no single nappy that will be best for every baby.

The best nappy is one that:

• fits your baby well

• provides enough absorbency for the time between changes

• helps prevent leaks

• feels comfortable against the skin

• is available in the right size

• offers good value for how well it performs

For newborns, fit and softness are especially important. For older babies and toddlers, absorbency, flexibility and ease of changing often become more important. Overnight, a secure fit and enough absorbent capacity are key.

If you are unsure, try a smaller quantity before buying in bulk and pay attention to fit, leaks and how comfortable your baby seems.