What Is Sizing Like at Jacquemus?

Jacquemus runs small and is cut close to the body — the dresses, trousers and tailoring all follow French sizing, which sits roughly one UK size below what you'd expect, so most women are safest sizing up at least one increment, especially in anything woven and structured.

I'll be honest: I learned this the hard way. A few seasons ago I ordered a Jacquemus blazer in my "usual" size for a press day, supremely confident, and spent the entire afternoon unable to lift my arms above my ribcage. Lesson well and truly learned. Simon Porte Jacquemus designs for a very particular, sculptural silhouette — nipped waists, cropped hems, architectural shoulders — and that cut is deliberate, not a manufacturing accident. Once you understand the house logic, it's actually one of the more predictable French labels to shop. Here's everything I tell my clients before they hit "add to basket".

How Jacquemus sizing actually works

It's French sizing. Pieces are labelled 34, 36, 38, 40 — and occasionally a simple 1, 2, 3. A French 36 broadly maps to a UK 8 and a 38 to a UK 10, but Jacquemus cuts leaner than that conversion suggests.
The fit is body-conscious. Waists are nipped, bodices are fitted and hems run short. If you're caught between two sizes, size up — you'll thank me.
Woven fabrics have almost no give. Trousers and structured dresses in cotton, linen or wool won't stretch, so don't bank on "wearing them in".
It varies wildly by line. Oversized trenches, dropped-shoulder shirts and knitwear are far more forgiving than the tailoring, which is where things get snug.

Jacquemus fit, piece by piece

Dresses — slim, feminine and frequently mini. Genuinely beautiful, but check the length against your own height before you commit, and size up if you carry curves through the bust or hip.
Trousers — high-waisted and clean-lined, but tight across the hip and thigh. Lovely on a straighter frame; size up if you're pear-shaped.
Tailoring & blazers — cut snug through the shoulder and arm (see: my press-day humiliation). Size up for comfort, or stick to size for that razor-sharp, fitted look.
Knitwear & tops — often cropped and boxy. Usually true to size, sometimes a touch generous.
Shoes — follow EU sizing but run narrow. Size up if you're between sizes or have a wider foot.

If Jacquemus isn't in the budget (or in stock)

Jacquemus is gorgeous, but it isn't the only way to get that sculptural, French-modern look. These are the labels I steer clients towards across every price point.

On the high street

Mango — consistently nails the sculptural French-girl dress and elevated tailoring at a fraction of the price; their tailored trousers are a brilliant Jacquemus stand-in.
COS — the high street's home of clean, architectural lines and minimalist volume, and the closest in spirit to Jacquemus' pared-back pieces.
Massimo Dutti — for slim, premium-feeling European tailoring and genuinely beautiful wool blazers.
Whistles — considered, contemporary dresses and separates with that quiet, grown-up polish.
Reiss — polished occasion tailoring and fitted dresses when you want real structure.
River Island — surprisingly strong on the cropped, body-con, trend-led shapes Jacquemus made famous.
Mint Velvet — relaxed-luxe knits and easy tailored trousers for the softer, oversized side of the look.
Topshop — back and brilliant for fashion-forward, sculptural going-out pieces.

Premium picks

Sézane — the Parisian label every stylist quietly hoards; effortless French chic with a touch more give than Jacquemus.
Ganni — Copenhagen-cool, playful sculptural shapes and statement dresses with personality.
Maje — French contemporary tailoring with a feminine, slightly rock edge.

Luxury & designer

Totême — Scandi minimalism and immaculate tailoring for the understated, investment side of the wardrobe.
Max Mara — the gold standard for sculptural coats and tailoring that lasts decades, not seasons.

Two under-the-radar names I love

Aligne — a London independent doing sculptural, sustainably-minded tailoring and dresses at a genuinely reachable price. A real insider favourite.
Róhe — a quietly directional Parisian-minimalist label for clean, sculptural pieces with serious longevity. One to watch.

Never guess your Jacquemus size again

Jacquemus' deliberate proportion play — micro hems one minute, oversized volume the next — makes it one of the trickier brands to buy online. That's exactly why I built Tellar.

Tellar is the UK's leading sizing tool: your body matched exactly to 1,500-plus brands, instantly — so you never look at a size guide again.

Measure once using your bust, waist, hip, or simply your existing size in a brand you already own.
Use the Store Size Lookup tool to get your precise size in any brand — Jacquemus, COS, Reiss, Everlane, Arket and more.
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And there's the Tellar Fashion Hub — 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.