What Is Sizing Like at Officine Générale?

By Ella Blake — Fashion Stylist | Tellar Fashion Hub — Always honest, unbiased & unsponsored

Officine Générale sizes small by UK standards — the brand runs on French EU sizing and their cuts are precision-tailored with a trim, close-to-the-body silhouette, so as a rule of thumb: if you're between sizes, go up, and if you're buying the first time, order a size larger than your usual UK size and work from there. I discovered this the hard way — fell head over heels for a beautifully cut wool-blend blazer from their website, ordered my usual size, and when it arrived it was pulling across the back. Sized up and it was absolutely perfect. Lesson learned, and it cost me a return. Don't make my mistake.

What Is Officine Générale?

If you haven't encountered them yet, Officine Générale is a Parisian label founded by Pierre Mahéo in 2012, and it's the kind of brand that makes you rethink your entire wardrobe. The aesthetic sits somewhere between precise French tailoring and relaxed workwear — think softly structured blazers, easy-fitting pleated trousers, crisp overshirts in washed linen and heavyweight cotton, and knitwear that actually has weight to it. It's grown a devoted following precisely because it threads that needle between casual and polished that so many brands get completely wrong.

The sizing, though, is very much a French affair — and if you're coming from UK high-street sizing, that means adjusting your expectations upfront.

Officine Générale Size Conversion Table

Officine Générale use French EU sizing, which runs smaller than UK standard. This table is your starting point — always check individual garment measurements too, as the fit varies by cut and fabric.

Officine Générale (FR/EU)UK Size (approx.)US Size (approx.)Bust (cm)Waist (cm)Hip (cm)346280–8262–6488–90368484–8666–6892–943810688–9070–7296–984012892–9474–76100–10242141096–9878–80104–106441612100–10282–84108–110

Bear in mind the conversion above is a guide, not a guarantee. Their sizing philosophy is rooted in French tailoring tradition — precise, without much ease built in — so your measurements matter far more than a number on a label.

Garment by Garment: What to Expect

Officine Générale isn't a one-size-approach-fits-all situation. Different garment types behave quite differently, and knowing the quirks before you buy saves a lot of back-and-forth with their returns team.

Tailored blazers & suits — This is where sizing up matters most. The shoulders are cut close and precise, and there's minimal ease through the chest. Their jackets are designed to sit sharp, not roomy — beautiful when they fit, but unforgiving if they don't. Size up by one if you're between sizes, or if you have broader shoulders. Trust me on this one.
Trousers — Their signature Pierre trousers have generous volume through the thigh and taper down — a deliberately anti-slim-fit design that looks spectacular but does require a proper fit at the waist. Generally true to size at the waist, but can be slim in the thigh on more fitted cuts. Know your hip and thigh measurements before ordering.
Shirts & blouses — Trim but not tight. Their shirts are designed with a relaxed Parisian ease in mind, but on a narrow base. True to size if you're slender through the shoulders; size up if you're broader or want to layer underneath. The linen shirts in particular are a dream — slightly oversized by design — and those you can take in your usual size.
Knitwear — Some of the most beautiful knitwear you'll find at this price point, particularly the merino and lambswool pieces. Sizing is generally true-to-size but without stretch, so measure your bust and don't assume. Fine-knit styles can feel snug; chunkier pieces have a little more natural ease.
Coats & outerwear — True to size in the body, but cut close through the shoulders and chest. Size up by one if you plan to layer heavily underneath — a thick jumper underneath a true-to-size Officine coat is a tight squeeze. For lighter layering, your standard size works well.
Dresses — Their dresses tend to be the most forgiving of all their garments. Fluid silhouettes in soft fabrics mean a little more room for interpretation. Generally true to size, but check the waist measurement if you're going for anything more structured.

The OG Aesthetic — Who Is It Really For?

Honestly, Officine Générale is one of those brands that rewards a certain kind of dressing. It's not for the maximalist, it's not for trend-chasing, and it absolutely isn't for anyone who can't be bothered getting their measurements right. But if you value considered, beautifully made clothes with a quiet confidence to them — the sort of things that look better the more you wear them — then it's worth every penny of the investment, and every minute spent working out your size correctly.

Their strongest pieces are the tailoring and the workwear-inspired separates. A well-fitted Officine blazer or a pair of Pierre trousers will outlast three seasons of trend-led high-street buying and still look completely relevant.

Similar Brands Worth Knowing

If Officine Générale speaks to you but you want options at different price points — or you want to try a brand with more predictable sizing first — here's where I'd direct you:

High street alternatives:

Whistles — Probably the closest the British high street gets to that refined Parisian ease. Their tailoring is well cut and their sizing is refreshingly consistent. A very good entry point into this aesthetic without the French sizing headache.
Jigsaw — Brilliant for elevated basics and structured separates. Understated, quality-focused and with a consistent size run that means once you know your Jigsaw size, you can shop confidently online. Their linen shirts are genuinely excellent.
Massimo Dutti — Uses European sizing (so converts in a similar way to OG), but their size guides are accurate and their tailoring is impeccable for the price. A natural stepping stone if you love the French aesthetic but want more accessible pricing.
Claudie Pierlot — A French brand through and through, stocked widely in the UK. Similar sizing conventions to Officine Générale (size up from UK), similar Parisian aesthetic, but at a slightly more accessible price point. Strong on occasion dressing and relaxed tailoring.
Me&Em — One of the most size-consistent British brands going. Their tailored pieces and elevated basics sit in the same visual territory as OG, with the added confidence of knowing exactly what size you'll need. Their knitwear is particularly strong.
All Saints — For the darker, more textural end of the OG customer's wardrobe. Consistent sizing, strong on outerwear and leather pieces, and reliably well reviewed for quality at the price.
Ted Baker — Sizing is detailed and generally true to size. Good for occasion-ready tailoring and smart separates, particularly if you want something more overtly polished than OG's workwear aesthetic.
Boden — Don't underestimate them. Their quality fabrics and commitment to honest sizing make them a genuinely useful reference brand. Strong on knitwear and structured dresses, and their size guides are among the best on the high street.

Premium picks:

Reiss — Sits comfortably in the same dressing space as Officine Générale. Sizing is notably consistent season to season, which makes online shopping significantly less stressful. Their tailored pieces are particularly well regarded.
LK Bennett — Occasion-ready polish with honest, reliable sizing. If Officine Générale's relaxed Parisian tailoring appeals but you need something more traditionally structured for work or events, LK Bennett is the natural step across.

Luxury & designer alternatives:

A.P.C. — The obvious French sibling. Also runs small, also uses EU sizing, but has a similarly devoted following for good reason. Their denim and outerwear are iconic. Expect the same size-up-from-UK rule to apply.
Isabel Marant Étoile — The diffusion line sits at a similar price point to Officine Générale and shares the same easy, undone Parisian energy. Sizing is on the small side — apply the same approach.

Two independent picks worth discovering:

Toast — A beautifully curated British independent label with a genuine craft ethos. Their linen and heavy cotton pieces share Officine Générale's love of quality fabric and easy silhouettes, but with clear UK sizing and detailed size notes on every product. Brilliant for the same customer, without the returns risk.
Asket — A Swedish brand built entirely around the idea of getting the fit exactly right. They offer granular sizing (including length variations) across a tightly edited range of essentials that would sit perfectly alongside an Officine Générale wardrobe. Their shirts and knitwear in particular are exceptional, and the sizing transparency is unlike anything else on the market.

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