The 411 on baby growsuits: Everything you need to know


Growsuits are the MVP of your newborn’s wardrobe. Forget all the frills, press studs and don’t even get us started on tulle.

In those early weeks and months with a newborn, onesies are your best friend. You’re all about survival, so do yourself a favour and save the fancy outfits for down the track. There will be plenty of time for that, but what other time in a human’s life is it acceptable, nay, encouraged to spend all day in a growsuit? 

For those first few weeks and months, your baby will be sleeping around the clock. And when they’re not sleeping they’re feeding, cuddling or “playing” aka tummy time or chilling. So comfort really is key.

We’ve teamed up with Purebaby to break down everything you need to know about buying growsuits for your little one.


Growsuits (also known as onesies) are the foundation of every good baby wardrobe. They are your go-to every day – simply vary the fabric and style for the weather and layer accordingly. Opt for thicker fabrics with long sleeves in winter and then you can add singlets, bodysuits or cardigans as you need. 

In the warmer months, you can go for lighter fabrics and short sleeve styles for keeping cool.


It can be so tempting as a parent-to-be with a shopping list of items as long as your arm for your new baby to opt for cheaper options. However, the problem with cheaper options is they are typically made from cheap materials that are not ideal for your baby’s delicate skin (and not to mention the environment). 

They often don’t last as long either which means you are spending more money, in the long run, replacing them.

When you opt for good quality, 100% organic cotton growsuits like all those in the Purebaby collection, you know that you are not only caring for your baby’s skin but you are also buying a product that will stand the test of time. Not only will it last for this baby, but it will also still be as good as new if you have more babies (or to pass on to friends.)


Buttons and press studs need not apply. We cannot stress this enough. When you are changing countless nappies a day and often in the dark of night, you do not want to be fiddling with buttons or studs. You can 100% guarantee they will NEVER match up. Purebaby’s range of growsuits all come with a double zip which is an absolute game-changer for quick changes.

Babies don’t have control over their little hands and can often scratch themselves accidentally with their fingernails. So optional inbuilt mittens are a great way to help your little one stay scratch-free – because we know mittens and socks never stay on. And just like us adults their the first thing to go missing in any laundry.

Sizing guides

Baby sizing is confusing and let’s face it all babies are so different when it comes to sizing and age is often not an accurate indicator of the best size for them. 

As a general rule, sizing for babies goes:

  • 0000 = Newborn
  • 000 = 0 – 3 months
  • 00 = 3 – 6 months
  • 0 = 6 – 12 months

Age is a great starting point but the best gauge is to go off your baby’s weight and height.

Washing instructions

Make sure you only opt for onesies that are machine washable. This is non-negotiable. 

You are going to be washing A LOT with a baby, there’s no avoiding it so the last thing you want is hand washing. Vomit, poo explosions and leaking nappies are all part and parcel of having a tiny baby and so you need durable fabrics that can be thrown into the washing machine and will come out looking and feeling exactly like they did when they went in (minus the 💩).

How many should you buy?

This is the big question and many parents will have an opinion on this one. But before you go buying dozens of outfits, stop and think. Your baby is likely to grow out of the newborn size fairly quickly, and some bigger babies don’t even fit in them at all! Or if your baby comes earlier than expected and is premature you are going to need to buy some smaller ones.

So that’s why it’s best to show restraint in this department. We know it’s in our DNA to want to buy ALL the cute things before your baby is born but instead opt for around 6-10 growsuits in 0000 and 000.

That way, once your baby is born and you have an idea of their sizing you can adjust accordingly. Once upon a time parents scrambled to get everything they needed before the baby arrived. However, these days with online shopping and click and collect, if you do decide you need more – or if your baby doesn’t fit the ones you bought – you can easily grab more.

Have fun!

Now even though earlier we said to be practical and opt for growsuits over tutus and elaborate outfits (for now),  that doesn’t mean you can’t still have some fun! Opt for growsuits in adorable prints that fit your personal tastes or aesthetic and go to town.

Because after all, dressing your precious bundle in adorable outfits is one of the most exciting parts of new parenthood after, you know, the cuddles and those adorable baby smiles…

This is a paid partnership between Kiindred x Purebaby.

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