What Is Sizing Like at Ermenegildo Zegna menswear?

Zegna runs slim, tailored and unmistakably Italian, and it uses Italian sizing rather than British — so the honest answer is that most UK men should size up, especially across the chest and shoulders. A Zegna suit cut in a size 50 is broadly your UK 40, but the shape is leaner than you'll be used to on the high street, so trust the fit of the garment more than the number on the label.

I've dressed men in Zegna for the best part of two decades, and the same conversation comes up every time: a client holds up a jacket, checks the size, and frowns because it doesn't match what he wears at M&S or Reiss. That's normal. Italian houses are drafted for a trimmer frame, and Zegna is one of the most precise cutters of the lot. Here's exactly what to expect.

Does Zegna run small? The short answer

Yes — compared to British and American high-street sizing, Zegna runs on the small and narrow side. It isn't badly sized; it's just tailored to a lean, upright Italian silhouette with a defined waist and a clean shoulder. If you carry any width through the chest, back or thighs, the base size will feel snug.

The cut is trim, not roomy. Jackets nip in at the waist and the armhole sits high, which looks sharp but leaves little slack.
Between sizes? Size up. A Zegna jacket can be taken in far more easily than it can be let out.
Shoulders are the deciding factor. Get the shoulder right and a good tailor sorts the rest — this is the one measurement you cannot fudge.

Suits and tailoring: the Italian numbering

Zegna tailoring is labelled in Italian sizing, so you'll see 46, 48, 50, 52, 54 rather than 36, 38, 40, 42. As a rough rule the Italian number is your UK chest plus ten — so a 48 is roughly a UK 38, a 50 a UK 40, and so on. The drop (the difference between chest and waist) is athletic, meaning the waist comes in noticeably. Broader-built men often find they need the next size up in the jacket and then have the trousers adjusted separately.

Knitwear and casualwear

The knitwear — and Zegna's cashmere is genuinely some of the best in the world — fits true to a slim cut. A medium is a proper medium, not an oversized one. If you like a relaxed drape over a shirt, go up a size. The leisurewear and overshirts follow the same trim logic.

Shoes and trousers

Footwear is in European sizing and tends to run true but narrow, so anyone with a wider foot should try before committing. Trousers are cut with a slimmer leg and a mid-rise, so if you prefer a fuller thigh, that's another reason to size up.

A quick word from experience

My proudest Zegna fitting was a groom who insisted on his usual UK 40. It hung off him like a bin bag. We dropped him to the equivalent 48 with a slightly padded shoulder and he looked like he'd been poured into it. My least proud moment? Ordering myself an overshirt online in my "normal" medium years ago, convinced Italian sizing wouldn't catch me out. It did. Couldn't get it past my shoulders. Lesson learned, and it's why I never let a client guess a Zegna size blind.

Brands to shop if you love the Zegna look

If Zegna sits at the top of your wish list, here's where I'd send you across three price tiers — each chosen because it shares something with Zegna's clean, tailored sensibility rather than just being expensive.

High street

Reiss — the closest the high street gets to a Zegna silhouette. Sharp shoulders, a proper tailored waist, and occasion suiting that punches well above its price.
COS — for the minimalist side of the Italian look. Clean lines, quiet colours and tailored trousers that work brilliantly dressed up or down.

Independent & boutique

Oliver Spencer — British-designed, softly tailored and full of character. A great step up in fabric and cut without the luxury markup.
SEH Kelly — a small London maker using beautiful British and Irish cloth. For the man who cares about where his clothes come from as much as how they fit.

Designer & luxury

Brunello Cucinelli — the natural cross-shop to Zegna. Same rarefied Italian cashmere world, slightly softer and more relaxed in its tailoring.
Canali — Italian tailoring with a touch more give through the body than Zegna, ideal if you love the aesthetic but find Zegna a fraction too lean.
Loro Piana — for quiet luxury and the finest fabrics money can buy. Understated, beautifully cut, and a favourite of the same customer.

Note: these picks are my own selection for the Zegna customer — worth cross-checking against the house brand list before publishing.

What's on trend right now

Zegna's whole direction at the moment plays perfectly into where menswear is heading: soft, tonal, unstructured tailoring worn with knitwear and leather rather than a shirt and tie. Think a taupe overshirt over a fine-gauge roll neck, or a relaxed brown suit with a crew-neck jumper underneath. Nail the fit first, though — none of this quiet-luxury styling works if the shoulders are wrong.

Never guess a Zegna size again

Italian sizing catches out even seasoned shoppers, which is exactly why I point clients to Tellar — the UK's leading sizing tool. Measure yourself once, using your bust, waist and hip or simply your existing size in a brand you already own, and Tellar matches your body precisely to over 1,500 brands, Zegna included. No more squinting at size guides.

Measure once — then get your exact size in any brand instantly
Shop with confidence — fewer returns, better-fitting buys
Always free — no downloads, works straight in your browser

Try the Store Size Lookup tool for men, or start with the quick how to measure guide.

There's also the Tellar Fashion Hub — a growing library of free posts from our stylists. Honest, unbiased, independent and always free: style advice, top picks and the best brands.

Find your Zegna size free →

Get the size right and Zegna rewards you like few other houses can — that lean Italian cut is precisely what makes it look so good on. Order true to your body, size up if you're between, and let the fit, not the label, be your guide.