What Is Sizing Like at Chelsea Peers?

By Ella Blake — Fashion Stylist | Tellar Fashion Hub

Chelsea Peers is a London-based brand specialising in pyjamas, loungewear, lingerie, and matching sets, and sizes across women's styles run UK 6 to 18 with broadly true-to-size proportions throughout the collection.

I'll be honest — Chelsea Peers wasn't on my radar for a while. I was firmly in the "M&S pyjamas and nothing else" camp for years. Then a friend sent me a matching satin set as a birthday gift, I put it on, and very quickly understood the hype. There's something about that combination of fun prints, soft fabrics, and coordinated sets that just makes you feel pulled-together even on a total duvet day. Since then I've ordered a fair few pieces, and I've worked out the sizing quirks well enough to stop second-guessing myself at checkout.

Does Chelsea Peers Run True to Size?

Broadly, yes — Chelsea Peers follows standard UK sizing with no dramatic quirks to navigate. If you're usually a UK 10, a size 10 across their pyjama sets and lounge pieces will typically fit well. That said, there are a few nuances worth knowing before you click 'add to basket':

• The brand uses a relaxed, easy-fit cut across most styles — comfort is clearly the priority, so pieces aren't cut close to the body.

• If you're between sizes and prefer a more fitted silhouette, sizing down tends to work well.

• Their satin and silky-finish pieces can feel a little more generous in cut than their cotton and jersey styles.

• Bottoms with a drawstring waistband are very forgiving — most people find them flexible across a size range.

• Sizing by Garment Type

Chelsea Peers spans several product categories, and they don't all behave identically. Here's what I've found — and heard back from readers — across the different ranges:

Pyjama Sets (Top & Bottom)These are the bread and butter of the brand, and they size predictably. Tops are cut with a relaxed boxy fit — not oversized, just comfortable. If you want that slightly more cropped, modern look you'll see on their product photos, stay true to size. Going up a size gives you more of a cosy, boyfriend-style feel which I personally love in winter.

Matching Lounge SetsThe shorts-and-top and jogger-and-top combos follow the same logic — true to size with a comfortable, non-clingy cut. The ribbed and jersey sets tend to have a little more stretch and can feel slightly smaller, so if you're in any doubt, size up.

Satin & Silky NightwearThis is where I'd say to pay a little closer attention. Satin and silky fabrics can sit differently depending on your shape. Chelsea Peers cuts these with a bit of extra ease, which is generally flattering but means they can feel generous if you're petite or slim-framed. For anything with a wrap or tie element, true to size is absolutely fine.

Lingerie SetsTheir lingerie follows standard UK bra and knicker sizing without anything unusual to flag. Bra sizing is standard — measure properly and go by your usual size. Knickers tend to run true to size, perhaps with a touch of generosity in the brief and shorts styles.

Maternity & Nursing StylesChelsea Peers has a solid maternity range and their guidance is to go by your pre-pregnancy size where possible. The pieces are designed with extra room where you need it, so you don't typically need to size up unless you're further along and want maximum comfort.

Similar Brands & How Their Sizing Compares

If Chelsea Peers regularly sells out of your size or you're building out your loungewear and pyjama wardrobe with a few alternatives, these are brands I'd reach for — all with a similar aesthetic and sizing approach:

• Marks & Spencer — The classic UK pyjama go-to. Sizes very consistently and has a huge range of prints and fabrics. Reliable true-to-size fit.

• Next — Great value matching sets and pyjamas. Slightly more structured cut than Chelsea Peers but sizes follow UK standard norms.

• River Island — Their loungewear range leans into the coordinated-set aesthetic perfectly. Sizes true to UK, with slightly more fitted cuts than Chelsea Peers.

• ASOS — A huge range of satin pyjama sets, printed loungewear, and lingerie. Use their detailed size guide as quality varies by brand.

• New Look — Affordable printed pyjama sets that channel a very similar vibe. Sizes run true across most styles.

• Boux Avenue — Particularly good for their lingerie range alongside loungewear. True to size throughout, with a premium feel at accessible prices.

• Primark — Don't overlook them for loungewear basics. Consistently true to UK sizing, and some of their satin-look sets are genuinely lovely.

• White Stuff — For a more grown-up printed pyjama set with lovely fabric quality. Sizes run true, possibly a touch generous in some styles.

For a step up in fabric quality and finish, The White Company and Anthropologie both do beautiful pyjama and lounge sets at a higher price point, with very reliable UK sizing throughout.

If you're after something a bit more special — the kind of pyjama set you'd actually pack for a weekend away — two independent brands worth knowing about are Desmond & Dempsey, a London-based luxury pyjama label with stunning prints and an almost cult-like following, and Piglet in Bed, a UK independent known for their exceptionally soft cotton and linen pyjamas. Both size in UK standard sizing and are completely worth the splurge.

At the luxury end, Olivia von Halle and Derek Rose both represent the pinnacle of the category — silk pyjamas and robes that feel genuinely extraordinary. Sizing follows European conventions, so do check their conversion charts carefully.

My Verdict on Chelsea Peers Sizing

Chelsea Peers is one of the easier brands to shop online — no dramatic sizing quirks, no mysterious European number systems, no need to second-guess yourself. Go true to your usual UK size for pyjama and lounge sets, consider sizing down if you want a more fitted look in satin styles, and lean on that drawstring waistband to do the fine-tuning. It's genuinely feel-good, fun-to-wear loungewear, and getting the fit right means you'll actually live in it — which, honestly, is the whole point.

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