What Is Sizing Like at Jasper Conran London?

By Ella Blake – Senior Fashion Stylist & Founder | Tellar — Always honest, unbiased, & unsponsored post

Jasper Conran London runs broadly true to size, but it’s cut on the neat, tailored side — so if you’re between sizes or buying a fitted dress, you’ll usually be happier sizing up. It’s a heritage British label built on clean lines and proper tailoring, and that precision is exactly why the fit feels a touch sharper than your average high street piece. Get the size right and these clothes hang beautifully; get it wrong and a structured silhouette has nowhere to hide.

I’ve dressed a lot of clients in Jasper Conran over the years, and the same pattern comes up again and again: people order their “usual” size, find the bust or waist a fraction snug, and assume the brand has shrunk. It hasn’t. It’s simply tailored to skim rather than swamp. Here’s how it actually fits, category by category.

How Jasper Conran sizing really fits

Dresses are the ones to watch. The cut is tailored and neat, and several styles run slightly small through the bust — so if you’re fuller-chested or hovering between sizes, take the larger one to avoid any gaping across the front.
Tailoring (trousers, blazers, pencil skirts) is true to size and beautifully structured. If your waist-to-hip difference is pronounced, buy for the hip and have the waist nipped in — it’s the single best £15 you’ll spend.
Knitwear and blouses sit closest to a standard fit. These are your safest “order your normal size” pieces, though a chunkier knit may want sizing up if you like to layer underneath.
Occasion and silk pieces are cut for a defined shape rather than a relaxed drape, so they reward knowing your exact measurements rather than guessing.

The brand spans roughly a UK 8 to 18, and like most premium labels the fit can shift subtly between collections and fabrics. A crepe midi and a cotton shirt dress in the same number will not always feel identical — which is precisely the trap that catches people out.

A confession from the fitting room

Early in my styling days I talked a bride’s mother into a gorgeous Jasper Conran silk dress in her “normal” 14, completely ignoring the neat bust. She came to the fitting, couldn’t do the zip up over a comfortable bra, and I had about forty minutes to fix it before the photographer arrived. We got there — a quick swap to the 16 and a belt to redefine the waist — but I’ve never forgotten the lesson. With this brand, size to your largest measurement and tailor in. Compression is unflattering on everyone; a clean, skimming line is flattering on everyone. That’s the whole game.

Love the look? Where else to shop tailored British style

If you adore that refined, structured Jasper Conran aesthetic, these high street names do polished tailoring and occasionwear exceptionally well — and they’re the ones I reach for most when I’m building a grown-up, put-together wardrobe:

Hobbs — arguably the closest cousin to Jasper Conran on the high street, with grown-up tailoring, occasion dresses and a famously consistent fit.
Whistles — clean, modern lines and beautiful fabric; their tailored dresses and trousers feel quietly expensive.
Phase Eight — the go-to for mother-of-the-bride and event dressing, with shapes that flatter a defined waist.
Jigsaw — understated, fabric-led pieces with that same heritage-British restraint and excellent knitwear.
Hobbs aside, Boden — reliable, true-to-size tailoring and dresses with a slightly more relaxed cut if Jasper Conran feels too sharp for you.
Mint Velvet — relaxed-luxe separates that bridge smart and casual; lovely for softening a structured look.
Monsoon — strong on embellished occasionwear and silk-blend dresses at a gentler price point.
Coast — built almost entirely around occasion dresses, with fitted, structured silhouettes that mirror Jasper Conran’s eveningwear.

Premium picks

Reiss — sharp, contemporary tailoring with a slightly more fashion-forward edge; superb for a fitted blazer or column dress.
L.K.Bennett — classic British elegance, perfect for occasions, with shoes and bags to match.
ME+EM — clever, considered design with built-in flattering details and a fit-conscious size range that’s worth knowing.

Luxury & designer

Max Mara — the gold standard for tailored coats and clean, architectural dressing that lasts decades.
Amanda Wakeley — understated British luxury, with fluid eveningwear and impeccable tailoring for serious occasions.

Two independents worth knowing

Cefinn — Samantha Cameron’s British label, built around versatile, workwear-ready tailoring and dresses cut to flatter; a brilliant, slightly under-the-radar alternative.
Beulah London — an ethically-minded British indie loved for elegant, feminine occasion dresses; ideal if you want something refined that nobody else in the room will be wearing.

How to nail your Jasper Conran size every time

Here’s where I’ll save you the returns faff. Rather than gambling on a number that shifts between every brand and every fabric, you can match your actual body to Jasper Conran’s real measurements in seconds using Tellar — the UK’s leading sizing tool, matching your body to over 1,500 brands instantly so you never squint at a size guide again.

Measure once — bust, waist and hip, or just enter a size you already own from a brand like M&S or Zara.
Use the Store Size Lookup tool to get your precise size in any brand — COS, Reiss, Everlane, Arket and more.
Always free, no downloads, works straight in your browser.

And once you’ve got your size sorted, the Tellar Fashion Hub is a library stacked with free posts from our top stylists — honest, unbiased, independent and always free. Style advice, top picks and the best brands, all in one place.

Never guess your size again.

Match your body to 1,500+ brands instantly with Tellar — the UK’s leading free sizing tool. Honest, unbiased, always free.

Find my perfect fit →