What Is Sizing Like at Olivia Rubin?

Olivia Rubin generally runs true to size, with a UK 4 to 24 range (labelled both numerically and XS to XXXL). If you know your usual British dress size, that's almost always the one to order. The brand's roomy, joyful aesthetic does mean a few quirks worth knowing before you commit — the strappy bodices can be generous up top, and the knitwear is deliberately relaxed — but on the whole this is a brand that fits the way it says it will. Let me talk you through it properly, because the difference between a Olivia Rubin dress you live in and one you quietly return usually comes down to picking the right style for your shape, not panicking over the size on the label.

So, Does Olivia Rubin Fit True to Size?

Yes — in the vast majority of cases, take your normal UK size and you'll be spot on. I've styled a fair few clients into those signature rainbow sequin numbers over the years, and the honest pattern I've seen is this: the woven dresses and midis behave themselves, while the more design-led pieces have a bit of personality in the fit. Here's what to actually watch for:

Midi and maxi dresses: reliably true to size. Order your usual UK number with confidence.
Strappy and bodice styles: these can sit loose or drop slightly at the bust. If you're fuller-chested, I'd genuinely consider sizing down on the top half or having the straps nipped in — a five-minute job for a tailor that transforms the dress.
Knitwear and cardigans: cut for a relaxed, cosy fit. Most people stay true to size, but if you like a neater silhouette, you've room to size down.
Co-ord sets: true to size, though I always tell clients to size for whichever piece is least forgiving — usually the skirt or trousers.

My own Olivia Rubin confession: I once sized up in a sequin slip dress for a wedding because I'd convinced myself "occasion = generous cut." Rookie error. It billowed at the bodice all night and I spent the speeches discreetly clutching it. Lesson learned — trust your true size with this brand, and only adjust the bust, never the whole dress.

How to Choose the Right Olivia Rubin Piece for Your Shape

This is where a bit of stylist nous earns its keep. The fabric and cut matter far more than the number on the tag:

Pear and hourglass shapes: the fit-and-flare midis are made for you — defined waist, swishy skirt, all the colour without clinging where you don't want it.
Apple shapes: reach for the relaxed knitted dresses and the looser column styles that skim rather than cinch.
Petite frames: the mini dresses are a dream, but check maxi lengths — Olivia Rubin cuts long, so you may want a quick hem.
Busty figures: structured bodices over strappy ones, and don't be afraid to size down up top.

Where to Shop If You Love the Olivia Rubin Look

If those rainbow stripes, painterly prints and unapologetic colour are your thing, there's a whole spectrum of brands doing playful, occasion-ready dressing at every price point. Here are my honest picks.

High Street

Boden — the closest high-street match for joyful print and colour, with proper attention to fit and a generous size range.
Monsoon — embellished and occasion dresses that channel the same celebratory mood for a fraction of the price.
Oliver Bonas — quirky, colourful prints with a strong eye for the unusual; brilliant for a statement midi.
Phase Eight — beautifully made occasionwear, reliably true to size and great for weddings.
Hush — relaxed, easy-to-wear colour and print, especially strong on the knitwear front.
Whistles — modern print midis with a slightly more pared-back, grown-up edge.
Coast — affordable occasion dresses when you need maximum impact on a budget.
Kew — softer, painterly prints and easy separates with a relaxed fit.

Premium

RIXO — the spiritual cousin of Olivia Rubin; dreamy hand-illustrated prints and floaty, true-to-size dresses.
& Other Stories — directional colour and print with a Scandi sensibility and a sharp, dependable fit.
Self-Portrait — for the embellished, occasion-defining moments, with structured cuts that hold their shape.

Luxury / Designer

Stine Goya — Copenhagen's queen of bold colour and abstract print; the natural designer step up from Olivia Rubin.
Saloni — exquisite printed silk dresses with a sophisticated, occasion-ready finish.
Borgo de Nor — romantic, vivid florals on covetable column and tiered shapes.

Two Left-Field Independents Worth Discovering

Never Fully Dressed — a London independent label built on vibrant, mood-lifting prints and clever wrap dresses that flatter genuinely every shape.
Kitri — small-batch London brand doing standout colour and print in limited runs, so you're far less likely to turn up in the same dress as someone else.

The Easiest Way to Nail Your Size — Every Time

Here's the honest truth after years of styling: the single biggest reason a beautiful dress gets returned isn't the brand, it's guessing the size. That's exactly why I built Tellar.

Tellar is the UK's leading sizing tool — your body matched exactly to 1,500-plus brands instantly, so you never have to squint at another size guide.

Measure once using your bust, waist and hips — or simply enter a brand size you already know fits you.
Use the Store Size Lookup to get your precise size in any brand — COS, Reiss, Everlane, Arket and many more.
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Get started here: https://tellar.co.uk/Store Size Lookup: https://tellar.co.uk/store-size-lookup/

And once you've sorted your fit, dive into the Tellar Fashion Hub — a library stacked with free posts from our top stylists. Honest. Unbiased. Independent. Always free. Style advice, top picks and the best brands, all in one place.

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