What Is Sizing Like at Extreme Cashmere?

Extreme Cashmere runs true to size, BUT it doesn’t do sizes in the conventional sense — every single piece is cut as “one size,” designed to suit a span of body shapes, with each individual style carrying its own recommended range (often something like XS–L or S–XL). So before you panic about there being no small, medium or large to click, know this: the Amsterdam label has built its entire identity around genderless, unisize knitwear that’s meant to drape rather than cling — and for most people, it genuinely works.

I’ll be honest with you. When I first started recommending Extreme Cashmere to clients, the “one size fits all” line made me wince. I’ve been styling long enough to know that phrase is usually code for “fits almost nobody.” I once talked a bride-to-be into a one-size knit dress for her rehearsal dinner and spent the morning of the event frantically pinning it — never again, or so I thought. But this brand is the rare exception, and once you understand how they cut their knitwear, it stops feeling like a gamble and starts feeling rather liberating.

How “one size” actually works here

Instead of a traditional size chart, Extreme Cashmere gives you two things on every product page — and you really should read both:

A recommended body range. Each garment tells you which frames it flatters best. One jumper might say it suits XS–L, another S–XL. That’s your first filter, and it’s the single most useful number on the page.
Flat measurements in centimetres. Shoulder-to-shoulder, chest, hem width and total length are all listed. This is the bit most people skip — and it’s the bit that matters most.

My go-to trick: take a jumper you already own and love, lay it flat on the bed, and measure straight across the chest. Compare that number to Extreme Cashmere’s listed chest measurement. If theirs is bigger (it usually will be — these pieces run roomy by design), you’ll know exactly how oversized it’s going to feel before you part with a penny.

How it falls on different bodies

This is where the one-size cleverness really shows. The knit is dense, the shoulders drop low, and the sleeves are deliberately long, so the same jumper reads completely differently depending on your frame:

Petite or smaller frames get a relaxed, slouchy, borrowed-from-him look — pushed-up sleeves and a hem that sits low on the hip.
Mid-range frames get the intended easy, modern drape you see in the brand’s own photography.
Taller or curvier frames get a closer, more standard fit rather than a voluminous one — still beautifully comfortable, just less slouchy.

The only people I’d gently steer? Very petite women who genuinely loathe excess fabric, and anyone sitting above a style’s stated upper range who’s hoping for that oversized look rather than a fitted one. Read the centimetres and you’ll always know where you’ll land.

My honest stylist take

The cashmere itself is exceptional — heavyweight, tightly knitted, and it ages beautifully. I’ve got one of their crewnecks that’s survived four winters and countless wool-cycle washes, and it still looks better than knitwear I’ve paid more for. You’re buying longevity here, not a logo. My one rule: if you fall between a style’s ranges, size your expectations by the measurements, not the label, and you’ll very rarely be disappointed.

Where else to shop for brilliant cashmere

If Extreme Cashmere’s price tag (comfortably £200+ for a jumper) makes you flinch, or you simply want to weigh up your options, here’s where I send clients across every budget.

High street

Uniqlo — the best-value genuine cashmere on the high street, reliably true to size and restocked every autumn.
M&S — decades of dependable cashmere, a forgiving fit and a colour range nobody else touches.
COS — architectural, gently oversized knits with that same minimalist, drapey spirit as Extreme.
Mango — surprisingly lovely wool-cashmere blends at a fraction of designer prices.
The White Company — soft, classic, beautifully finished essentials that never look cheap.
Massimo Dutti — premium-feeling knitwear that consistently punches above its price point.
Jigsaw — grown-up, considered cashmere with a slightly neater cut if you dislike volume.

Premium

Brora — Scottish cashmere royalty and, for my money, the gold standard for colour and quality.
Me&Em — clever, flattering knits genuinely designed around real women’s bodies.
Toast — relaxed, artful pieces with the same understated soul as Extreme Cashmere.

Luxury / designer

Max Mara — investment knitwear with impeccable structure and the kind of drape that lasts a lifetime.
Totême — Scandinavian minimalism; oversized but always precise.
Ralph Lauren — timeless, polished cashmere that simply never dates.

And two off-radar independents I love

Navygrey — a small British label doing one near-perfect, ethically made cashmere jumper in a tight, considered edit of colours.
&Daughter — Irish and British craftsmanship, with beautifully traditional knitwear viewed through a thoroughly modern lens.

How Tellar takes the guesswork out

Here’s the thing about brands like Extreme Cashmere — the moment you step outside standard S/M/L, those centimetre measurements become everything, and nobody actually wants to stand in the kitchen with a tape measure. That’s precisely why I built Tellar.

Tellar is the UK’s leading sizing tool: your body, matched exactly to 1,500+ brands, instantly. Never squint at a size guide again. And alongside it sits the Tellar Fashion Hub — a library stacked with free posts from our top stylists. Honest, unbiased, independent and always free.

Measure once — using your bust, waist, hip, or simply a brand size you already wear.
Use the Store Size Lookup tool to get your precise size in any brand — COS, Reiss, Everlane, Arket and more.
Always free, no downloads needed — it works right in your browser.

Find your exact size in 1,500+ brands

Stop second-guessing one-size knitwear. Let Tellar match your measurements to the perfect fit — free, honest and instant.

Try Tellar free → Store Size Lookup

Keep reading on the Tellar Fashion Hub

Ella Blake — Senior Fashion Stylist & Founder, Tellar