What Is Sizing Like at Bella Dahl? A Stylist's Honest Fit Guide

Here's the short answer: Bella Dahl largely runs true to size on the numbers, but it almost never feels true to size — because the fabric does the talking. This is a Los Angeles label built around soft, drapey Tencel lyocell, so even a piece cut to your exact measurements will sit looser, slouchier and more relaxed on the body than a structured cotton shirt would. Once you understand that, you'll get it right first time. Get it wrong, and you'll either swim in it or wonder why your "true size" feels like a fitted blouse.

I've styled a lot of clients into Bella Dahl over the years, and I'll be honest — the first one I bought myself, years ago, was a button-down I sized down in because the model looked so relaxed I assumed it was a tent. It arrived clinging in a way the brand never intended, and I had to swap it. Lesson learned, and one I'll pass straight to you.

How Bella Dahl Sizing Actually Works

Bella Dahl is based in LA and uses US sizing, broken into the standard alpha bands — XS, S, M, L, XL — mapped to US numeric sizes. The key thing for UK shoppers is that a US size does not translate cleanly to a UK one, so don't assume your usual UK number. Work from your actual body measurements instead.

A few things I always tell clients before they buy:

The bands are generous through the body. Bust and hip measurements per size are comfortable rather than snug, which is why so many pieces read as relaxed.
The waist is the bit to watch. On bottoms especially, the waist is the most "true" measurement, while the leg and hip stay loose — so size to your waist, not your hips.
Fabric weight changes everything. Most signature pieces are 100% Tencel lyocell, which is fluid and slightly weighty. It skims rather than holds.

The Button-Downs: Their Hero Piece

If you're looking at Bella Dahl, nine times out of ten it's the button-downs. They're the thing the brand is famous for, and they're also where people get the fit wrong most often.

Standard button-downs run true to size but drape considerably. Take your normal size and expect a soft, fluid finish — not a crisp shirt.
Anything labelled "oversized" or "shirt tail" runs big on purpose, with a longer back hem and a borrowed-from-him feel. If you don't want it huge, size down one.
The slimmer styles — "clean placket" or hidden-placket shirts — are genuinely tailored and the exception to the relaxed rule. These sit closer to a true UK fit.
Petite frames should size down across the board. At 5'10" the brand's own models wear an XS, which tells you everything about the intended drape.

One styling note: because the Tencel is soft and occasionally a touch sheer in pale shades, a smooth nude bra or a fine vest underneath keeps it looking expensive rather than flimsy.

A Quick Word on Care (It Affects the Fit)

Tencel is brilliant — breathable, soft, drapes like a dream — but it can relax further with wear and shift if you're rough with it. Machine wash cold, and don't tumble on high. Treated kindly, the fit you bought is the fit you keep.

Where to Shop for the Same Relaxed, Soft Look

If you love the Bella Dahl feel — that easy, drapey, Californian softness — here's where I'd send clients across every budget. I've matched each to the specific thing they do best, not just thrown names at you.

High Street

Cos — the closest high-street match for fluid, minimalist drape and soft, sculptural shirting.
Seasalt Cornwall — the UK's answer to that relaxed coastal softness; brilliant easy button-downs and breezy cotton.
Mint Velvet — nails the elevated-loungewear-meets-real-clothes territory Bella Dahl lives in.
Massimo Dutti — for premium-feeling soft shirts with a touch more polish and a slightly cleaner cut.
Whistles — excellent relaxed, considered shirting if you want the look slightly more grown-up.
White Stuff — soft, easy-wearing casual pieces with the same throw-on-and-go ethos.
Jigsaw — refined, fluid separates with quietly good fabric for the money.

Premium

Me&Em — clever, flattering cuts in beautiful soft fabrics; their relaxed shirts are a genuine Bella Dahl rival.
Reiss — for a more structured, polished take when you want the drape dialled down a notch.

Luxury / Designer

Max Mara — the gold standard for relaxed luxury and fluid, weighty fabrics that fall exactly where they should.
Claudie Pierlot — French effortless-chic with that undone, soft-tailoring sensibility.

Two Independents Worth Knowing

Albaray — a lovely independent UK label doing soft, conscious, relaxed womenswear that flies under the radar.
Aspiga — sustainable, breezy, resort-leaning pieces with exactly the coastal softness Bella Dahl fans gravitate to.

How Tellar Takes the Guesswork Out of It

Bella Dahl is precisely the kind of brand where a size chart only tells you half the story — and that's the gap Tellar.co.uk closes. It's the UK's leading sizing tool, matching your body to over 1,500 brands instantly, so you never squint at a size guide again. And there's a Fashion Hub library of free posts covering every fashion query — always honest, always unbiased, always free.

Measure once, using your bust, waist, hip, or an existing brand size you already trust.
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 straight in your browser.

And do explore the Tellar Fashion Hub: a library stacked with free posts from our top stylists. Honest. Unbiased. Independent. And always free — style advice, top picks and the best brands.

Find your exact Bella Dahl size in seconds

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