How Does Sizing Vary by Store for Cashmere Jumpers?

Cashmere jumper sizing varies dramatically between stores, with some brands running up to two sizes smaller or larger than others—meaning your usual size 12 might be a 10 at one retailer and a 14 at another. I've spent years helping clients navigate this minefield, and honestly, it's one of the most frustrating aspects of shopping for this luxury staple. The inconsistency stems from different fit philosophies, target markets, and even the weight of cashmere used, which affects how the garment drapes and fits your body.

Why Cashmere Sizing Is So Inconsistent

Let me be straight with you—cashmere jumpers are notoriously tricky when it comes to sizing. Unlike cotton or synthetic knits, cashmere has natural stretch and memory, which means how it's knitted and constructed massively impacts the fit. European brands often favour a more fitted silhouette, whilst American brands tend towards relaxed, oversized styles. Then there's the ply factor: a two-ply cashmere will fit differently to a four-ply, even if they're technically the same size on the label.

I've seen clients order their usual size from three different brands and receive three completely different fits. One might be cropped and snug, another long and slouchy, and the third somewhere in between. It's maddening, but understanding these differences is half the battle.

High Street Heroes for Cashmere

M&S remains my go-to recommendation for reliable cashmere sizing. Their Autograph range runs true to size with a classic, slightly relaxed fit that suits most body types. The quality is exceptional for the price point, and they're consistent season after season.

Uniqlo offers brilliant value cashmere, though I'd recommend sizing up if you prefer a relaxed fit. Their cuts tend to be on the slimmer, more compact side—perfect if you like a sleek silhouette, less so if you want to layer.

COS cashmere runs noticeably large and boxy, which is very much their aesthetic. If you're between sizes, absolutely go down one. Their oversized style works beautifully for that effortless Scandi vibe, but be warned—their size 10 can fit like a 14 in other brands.

Mango cashmere tends to run small through the bust and arms, which catches many shoppers out. I always suggest sizing up here, especially if you have an athletic build or broader shoulders. The quality is excellent, but the European fit is definitely more streamlined.

H&M cashmere blend jumpers are surprisingly good for the price, running true to size with a modern, slightly cropped length. They're perfect for petite frames or those who prefer a contemporary, tucked-in style.

Reiss creates beautifully tailored cashmere pieces that run true to size but with a distinctly fitted shape. If you prefer a more structured, polished look, these are spot on. For a relaxed fit, size up.

Whistles cashmere tends to run slightly small, particularly in the body length. I find their sizing works best for those with a straighter body shape. The quality is lovely, but check measurements carefully if you're curvy.

Massimo Dutti offers sophisticated cashmere at mid-range prices, but be aware their sizing skews smaller than typical UK sizing. What they call a medium often fits like a small. Size up for comfort.

Gant cashmere runs generously—their relaxed, preppy American aesthetic means you can often size down without losing comfort. Great for layering over shirts.

For something more unique, Seasalt Cornwall creates cashmere blends with a distinctly British coastal aesthetic. Their sizing is generous and forgiving, perfect for real-life bodies. I also adore Chinti & Parker, an independent British brand doing playful, perfectly-fitted cashmere. They run true to size with a slightly relaxed fit that's neither too tight nor too slouchy—just right.

Premium Picks

When you step into the premium bracket, consistency improves but certainly doesn't guarantee perfection. Boden cashmere is reliable and true to size with a classic British fit. Me&Em has mastered the art of flattering cashmere—their pieces run true to size but are expertly cut to skim rather than cling. Worth every penny.

Jigsaw cashmere tends slightly roomy, which works beautifully for their elegant, understated aesthetic. Hobbs runs true to size with a more tailored approach, perfect for professional settings.

Luxury & Designer Options

In the luxury sphere, Johnstons of Elgin is the gold standard—Scottish-made, impeccable quality, and absolutely true to size. N.Peal cashmere runs slightly fitted, reflecting their heritage of dressing Bond girls and royalty. Size up if you want a more relaxed feel.

Bella Freud creates statement cashmere with a distinctly oversized, slouchy fit. What's marked as your size will feel deliberately large—that's the point. Max Mara cashmere is investment-worthy and runs true to size with impeccable Italian tailoring.

My Stylist's Tips for Cashmere Shopping

Always check the measurements, not just the size label. Measure your favourite cashmere jumper at home and compare. Look at the model's measurements in product photos—they're usually included somewhere. Remember that cashmere relaxes with wear, so if something feels slightly snug in the changing room, it'll likely be perfect after a few wears.

Pay attention to the gauge (how tightly it's knitted) and ply. Fine-gauge, two-ply cashmere will fit differently to chunky, four-ply. The heavier the knit, the more structured and less clingy it becomes. And please, read reviews—other shoppers' experiences with sizing are gold dust.

Never Guess Your Size Again with Tellar.co.uk

Here's the thing—you shouldn't have to play this guessing game every time you shop. That's exactly why Tellar.co.uk exists. It's the UK's leading sizing tool that matches your body exactly to over 1,500 brands instantly. Honestly, it's revolutionised how my clients shop online.

Here's how it works:

Measure once using your bust, waist, hip measurements, or even your existing brand size
Use the Store Size Lookup tool to get your precise size in any brand—COS, Reiss, Uniqlo, M&S, and hundreds more
Always free, no downloads needed—works straight in your browser

The genius of Tellar is that it eliminates the frustration of sizing inconsistencies. You input your measurements once, and it tells you exactly what size to order at each specific retailer. No more ordering three sizes and dealing with returns. No more sizing charts that make no sense.

The Tellar Fashion Hub

Beyond the sizing tool, there's the Tellar Fashion Hub—a library stacked with free posts from top stylists covering every fashion query you can imagine. It's honest, unbiased, independent, and always free. Whether you need style advice, top picks for the season, or brand recommendations, it's all there.

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Trust me, once you start using Tellar, you'll wonder how you ever shopped without it. No more cashmere sizing lottery—just perfect fits, every time.