What Is Sizing Like at Charles Tyrwhitt?

Does Charles Tyrwhitt run big? Yes — here's the honest answer

Here's the thing nobody at the checkout tells you: Tyrwhitt's fits run more generously than the labels suggest. Their "Extra Slim" fits roughly like a normal "Slim" from most other brands. I've had clients order Extra Slim expecting something skin-tight and find there's still a good handful of fabric to grab at the waist.

So my rule of thumb: size the fit, not the collar. If a Slim feels a touch roomy on you, don't drop half an inch off your collar and choke yourself — go one cut slimmer instead. It's the single most useful piece of advice I can give you about this brand.

Between Slim and Extra Slim, and you like a clean line? Take the Extra Slim.
Lean build, always tucking in, hate any excess fabric? Go Super Slim.
Broader or a bit older and you value comfort over sharpness? Slim is your friend, not Classic — Classic is only really for genuinely big frames or those who wear a shirt untucked at the weekend.

The four fits, and what they actually mean

This is the bit that catches everyone out. Tyrwhitt doesn't do small–medium–large. Shirts are sold by collar size in inches (say, 15.5") paired with a sleeve length in inches (say, 34"). Then, on top of that, you choose one of four cuts:

Classic Fit — the traditional Jermyn Street cut. Roomy through the shoulders and chest, loose at the waist, with extra-long tails and back pleats. Comfortable, but it billows if you're slim.
Slim Fit — nipped in at the waist with slimmer sleeves and a defined shape. This is the one that suits the most men, and where I'd point most people first.
Extra Slim Fit — tapered chest and waist, back darts instead of pleats. Contemporary and close, but read the next section carefully before you jump straight to it.
Super Slim Fit — the genuinely trim one. Same chest as Extra Slim but taken in properly through the waist. If you're lean and tuck in, this is your fit.Measure the two things that matter

You only need two numbers, and Tyrwhitt makes both easy because they offer proper sleeve lengths rather than the lazy "short/regular/long" most high-street brands fob you off with.

Neck: measure around the base of your neck with the tape sitting where your collar would, then add half an inch for comfort. That's your collar size — full stop, don't guess it.
Sleeve: from the centre-back of your neck, over the shoulder and down to the wrist bone. Get this right and your cuff peeks out of a jacket exactly as it should. Get it wrong and you'll spend your life pushing sleeves up.

One material tip while I'm here: their non-iron twill is the workhorse — it wears soft, resists creasing and survives the washing machine. The Egyptian cotton poplin looks lovely and dressier, but it needs more care and can feel a bit crisp after a lot of washes. For a first order, twill every time.

A quick confession from my own wardrobe

Early in my career I turned up to a client's wedding — I was styling the groom — in an Extra Slim white Tyrwhitt shirt I'd ordered a size down on the collar because I fancied looking trim in the photos. Reader, I couldn't do the top button up, spent the ceremony with my tie doing the heavy lifting, and by the speeches I'd gone quietly puce. Lesson learned: get the collar right and let the cut do the slimming. I've never sized down a collar since, and neither should you.

How to style it, and what's worth buying now

Tyrwhitt sits squarely in smart-and-occasion territory, and the trend right now is firmly on its side — proper collars, real tailoring and "quiet" formalwear are having a proper moment after years of everyone slobbing about in gym gear.

The office rebuild: a white and a pale blue non-iron twill in Slim fit will carry you through any working week. Under a navy blazer they're faultless.
Weekend smart-casual: an Oxford cloth button-down worn open-necked with dark denim or stone chinos. Buy it a fit looser than your formal shirts so it sits easily untucked.
Occasion wear: a Marcella-front dress shirt with double cuffs is a genuinely good-value black-tie option from Tyrwhitt — pair it with your own studs and you'll look a hundred quid dearer than you spent.
One trend to lean into: the cutaway and semi-cutaway collar. It flatters most face shapes and looks sharper open-necked than a tired old point collar.

And whatever you do, never pay full price. Tyrwhitt runs multi-buy deals almost constantly — four shirts for a set price is the way in. Build the wardrobe on a deal, not on a whim.

Brands to wear alongside Charles Tyrwhitt

If Tyrwhitt has you thinking about your smarter wardrobe more broadly, here's where I'd send clients across three tiers — with a note on how each one sits next to Tyrwhitt's fit, so you're not guessing all over again.

High street

Hawes & Curtis — the most direct like-for-like. Another Jermyn Street shirt house with the same collar-inch sizing and a similar multi-buy model. Their slim cut runs a touch trimmer than Tyrwhitt's Slim, so it's a good shout if you find Tyrwhitt a little roomy.
T.M.Lewin — cracking value formal shirts. Historically cut a bit fuller, so their "fitted" lands close to Tyrwhitt's Slim. Ideal for broader necks and anyone building a work wardrobe on a budget.
Moss — where I'd send you for the suit that goes under the shirt. Their tailored fit sits comfortably alongside Tyrwhitt's cut, and you can get properly measured in-store, which shirt sites can't offer.

Independent & boutique

Emma Willis — a British-made step up in cloth and finishing. Cut cleaner and slightly slimmer through the body than a Tyrwhitt Classic, so size for your collar and enjoy the upgrade in feel.
Budd Shirtmakers — the traditional English shirtmaker off Piccadilly Arcade, with those lovely high collars. It's cut generously, much like Tyrwhitt's Classic, so order as you would there.
Cordings of Piccadilly — heritage country-formal for tweed, viyella and the sort of shirt you wear to a shoot or a country wedding. Runs roomy, so take the trimmer option if you're between sizes.

Designer & luxury

Turnbull & Asser — Jermyn Street royalty (yes, the Bond one). Famous for a high three-button collar and a generous English cut, closer to Tyrwhitt's Classic than its Slim — size for the collar and the fabric does the rest.
Eton — the Swedish luxury shirtmaker that most reviewers reach for as "the next level up" from Tyrwhitt. Cleaner and slightly slimmer for the same collar: their Contemporary fit lands near Tyrwhitt's Slim, their Slim near the Extra Slim.
Canali — Italian tailoring for when you want a serious suit over your shirts. Cut lean with a slightly shorter sleeve, so size up if you're between, and let a Tyrwhitt shirt sit underneath it beautifully.

Know your exact size before you buy — free, at Tellar

Sizing across brands is a minefield, and I've just spent this whole piece proving it. That's exactly what Tellar exists to fix. It's the UK's leading sizing tool — measure yourself just once, or enter a size you already own, and Tellar matches your body to your precise size across 1,500+ brands instantly. No more squinting at size guides, no more guessing which "slim" is actually slim.

Use the Store Size Lookup to get your exact size in Charles Tyrwhitt and any brand in this post — then shop with confidence, cut your returns, and get a better fit first time. It's honest, unbiased, needs no download and it's always free. Alongside it sits the Tellar Fashion Hub: a growing library of free, independent posts from our stylists, covering just about every fashion query you can think of.

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