Kids' Pyjamas

At SillySanta you'll find over 10 matching styles of kids pyjamas – also known as children's pyjamas or kids' PJs – rated 4.9 out of 5 from over 400 reviews. Match the whole family on this year's Christmas card! From festive overall sets with red and blue Christmas patterns to playful teddy bear onesies and licensed designs featuring Harry Potter, there are kids' pyjamas for every little one in our collection.

Matching kids pyjamas for the whole family on Christmas morning

This is the bit we love most. A child in their own little festive set, sitting next to a brother or sister in the same print, with mum and dad in the grown-up version: that's the Christmas Eve photo people keep for years. Our kids' designs are built to coordinate with the rest of our pyjamas range, so you can dress everyone in the family in the same look without hunting around different shops. Siblings can twin in matching prints, and the kids can wear a mini-me version of the set the grown-ups have on.

You don't have to match the whole house to make it work, either. A lot of parents start with one child's set and add to it the following year, or pick a single shared print for the kids and let the adults do their own thing. However you build it, the point is that festive sleepwear feels like a small family tradition rather than just another item of clothing.

The range: Christmas sets, onesies and Harry Potter pyjamas

There's plenty of choice across the 25 styles, and it isn't all one type of thing. The Christmas pyjamas include overall-style pattern sets in blue and red, the cheerful Hohoho print, and a proper festive Christmas knit, so there's a design to suit a child who loves bold colour and one who prefers something a bit more classic.

Then there are the teddy-bear onesies in brown, pink and grey. These are the cuddly, all-year option: easy to pull on and lovely and warm for little ones who feel the cold. And for the fans, we have officially licensed Warner Bros. Harry Potter pyjamas in blue and red, exclusive to SillySanta, which work brilliantly as a gift for a child who's just discovered the books or films. Colours across the collection run from blue, red and pink to brown, burgundy and grey, so it's easy to find something that suits.

Fabric and comfort for sensitive young skin

Comfort matters most when it's something they'll sleep in, so we've kept the fabrics simple and kind. Our pyjama sets are a 95% cotton / 5% elastane blend: soft against the skin, breathable, with just enough stretch to move in and enough durability to survive a busy bedtime. The little bit of give means they're comfy to wriggle into and don't feel stiff after a wash or two.

The teddy-bear onesies are made from super-soft teddy fleece instead, which is where the warmth comes from. One of ours is genuinely described as like getting a giant hug, and that's the right idea: it's the kind of thing a toddler happily lives in on a cold weekend morning. Worth knowing that not every item is cotton, so if you specifically want the cotton-blend feel, reach for a two-piece set rather than a fleece onesie.

Sizing your kids pyjamas with confidence

We carry a full span of sizes so the page covers your child whatever their age: 6–12 months, 1–2Y, 2–4Y, 4–6Y, 6–8Y, 8–10Y, 10–12Y and 12–14Y. The sizing is straightforward: choose the size your child would normally wear. Some styles are slim and some are regular, so if your child is between two sizes, or you want a bit of growing room, size up. That tends to be the safer call for sleepwear you'd like to get more than one winter out of.

Onesies or two-piece sets: how to choose

It mostly comes down to age and how easy you want getting dressed to be. The teddy-bear onesie is the simplest option for babies and toddlers: there's nothing to tuck in and no top and bottoms to match up, so it goes on in one go and stays put through the night. It's also the warmest pick for the coldest months.

A classic two-piece set tends to suit older children who like the independence of dressing themselves, and it's easy to mix and match the top and bottoms as they grow. If your child runs warm or you want something for milder nights, the cotton-blend sets are the more breathable choice. Plenty of families keep both on hand: an onesie for the deep-winter weekends and a set for the rest of the year.