What Is Sizing Like at Rebecca Vallance?

By Ella Blake — Fashion Stylist | Tellar Fashion Hub — Always honest, unbiased & unsponsored

Rebecca Vallance uses Australian sizing, which for most women aligns closely with standard UK sizing — an AU 10 is a UK 10 — but the brand's cuts are tailored quite closely to the body, so if you're between sizes or fuller through the bust and hips, sizing up one is genuinely worth considering. It's a brand I've been recommending to clients for years, and the one piece of advice I always lead with is: this is not the place to be optimistic about your usual size.

So, Who Is Rebecca Vallance?

If you're not already across Rebecca Vallance, let me fill you in — because this Australian luxury brand deserves far more recognition in the UK than it currently gets. Founded by Rebecca Vallance-Bhatt and launched in 2012, the brand has built its reputation on impeccably structured occasion wear: think sharp-shouldered blazer dresses, corseted mini dresses, sleek jumpsuits and cocktail gowns that look genuinely expensive because they are. The construction is exceptional — boning, structured linings, precision seaming — and the aesthetic sits squarely in the category of "grown-up glamour." Not fussy, not overtly trendy, but with a confidence and polish that's really hard to replicate at lower price points.

I first got properly acquainted with the brand when a client needed something for a black-tie dinner in London that wasn't going to look like every other LBD in the room. A Rebecca Vallance midi dress with a draped neckline and structured boning sorted the entire brief. She wore it with barely any jewellery and looked genuinely jaw-dropping. Since then, it's become my go-to recommendation for women who want occasion dressing that feels distinctive rather than safe.

The Core Sizing Situation

Here's the important bit. Rebecca Vallance uses Australian sizing on their labels, and the good news is that AU sizing runs in direct equivalence to UK sizing — so an AU 6 is a UK 6, an AU 10 is a UK 10, and so on. You don't need to do any conversion maths, which is a relief compared to brands using Italian or US sizing.

The complication is the cut. Because these are structured, closely tailored pieces — dresses with boning, blazers with precise shoulder seams, bodices cut for a defined silhouette — there is very little ease built in. This is intentional: the brand wants the clothes to hold their shape on the body, and they do it brilliantly. But it does mean:

If you're between sizes, go up rather than down.
If you carry more volume through the bust or hips than the waist, size to your largest measurement and have a tailor nip in the waist if needed — far easier than dealing with a too-tight bodice.
If you're buying a corseted or boned style, measure your natural waist and bust carefully and compare to the product measurements before ordering.
The brand's size range typically runs AU 6 to AU 16 (UK 6 to UK 16) on most styles — check individual listings as some pieces have a narrower range.

Rebecca Vallance Size Conversion Table

AU / UK SizeEU SizeUS SizeBust (cm)Waist (cm)Hips (cm)634280628783648466911038688709512408927499144210967910316441210486111

Always cross-reference with the individual product measurements on the Rebecca Vallance website, NET-A-PORTER, or Selfridges — boned and structured pieces in particular will list specific measurements that are more useful than the size label alone.

Fit Breakdown by Category

Dresses — The Brand's Absolute Strongest Suit

This is where Rebecca Vallance earns every bit of its reputation. The cocktail dresses, the midi occasion pieces, the strapless gowns — the construction is exceptional and the fit, when you've got the size right, is genuinely transformative. These are clothes that do the work for you: the boning holds you in, the seaming creates shape, the structured skirt or draped bodice does what a really good tailor would do. Wear the right size and it's one of the best things you'll ever put on. Wear the wrong size and it will be uncomfortable and unflattering in equal measure.

Boned and corseted dresses: Size by your bust first, then check the waist measurement against your own. If your waist is larger than the garment's waist measurement, size up — you can always have a dress taken in at the waist, you cannot let out a boned bodice.
Column and sheath styles: These are cut with minimal ease — size true to your larger measurement between bust and hips.
Draped and one-shoulder styles: Slightly more forgiving in construction, but still size up if in doubt.

Blazers & Tailoring — Sharp and Intentionally Close-Cut

Rebecca Vallance's tailoring — blazer dresses, structured jackets, tailored trousers — is brilliant but uncompromising. The shoulder seam sits precisely where it's meant to, the chest is cut close, and there's no excess fabric anywhere. For the blazers specifically, go by your bust measurement. If your shoulders are broader or you carry more through the upper arm, size up one from your standard — the structured cut means there's no wriggle room here. I've seen clients squeeze into their usual size and look amazing in photos but feel restricted all evening. It's not worth it.

Jumpsuits — Measure Your Torso Length

Rebecca Vallance does some genuinely stunning jumpsuits and this is where an often-overlooked measurement matters: your torso length. If you're taller or have a longer body, the fit through the crotch on a structured jumpsuit can be uncomfortable even when the rest of the garment fits. The brand's pieces are cut for an average height of around 5'7" to 5'8". If you're significantly taller or shorter, factor that in. Otherwise, size as you would for a dress — by your bust first, then check the waist.

Style Advice — How to Wear Rebecca Vallance

One thing I always tell clients: let the dress do the talking. Rebecca Vallance pieces are designed to be the focal point of a look — they don't need much help. A pair of barely-there heeled sandals, simple drop earrings, a small evening clutch. That's it. The clothes have enough going on structurally and design-wise that piling on accessories starts to compete rather than complement. Keep the rest of the look clean and confident. That's the Rebecca Vallance formula.

Similar Brands — Across Every Budget

Whether you're looking for accessible alternatives with a similar sensibility, or you want to explore the wider landscape of occasion dressing, here are my honest picks:

High Street & Contemporary

Hobbs — My most consistent recommendation for structured, polished occasion dressing on the British high street. The tailoring is genuinely excellent, the sizing is reliable UK standard, and the aesthetic has a similar grown-up confidence to Rebecca Vallance at a fraction of the price.
Ted Baker — Strong on embellished and occasion dresses with a feminine, detail-led approach. The sizing runs a touch small so check carefully, but the quality and design at this price point is very good. Great for weddings and black-tie events.
French Connection — An often-underestimated brand for sleek, body-conscious occasion wear. Their bandage-style dresses and structured minis carry a similar sharp energy to Rebecca Vallance and the sizing is consistent UK standard.
Mango — Increasingly brilliant for occasion wear that looks more expensive than it is. Their structured blazer dresses and tailored co-ords are particularly good and the sizing is broadly true to EU/UK standard.
Massimo Dutti — The most sophisticated option on the Inditex roster by some distance. Clean lines, beautiful fabrics, precise tailoring. If you love the structured simplicity of Rebecca Vallance, Massimo Dutti's tailoring section is worth a serious look. Uses EU sizing.
Warehouse — Often overlooked but genuinely strong on occasion dressing. Their structured midi dresses and evening pieces punch well above their price point and sizes run true to UK standard.
Banana Republic — Excellent for sharp, boardroom-to-cocktails tailoring with a considered aesthetic. The blazer dresses and structured occasion pieces are particularly strong and the brand has been investing seriously in quality recently. Uses US sizing so check the conversion.

Premium & Luxury Alternatives

Roland Mouret — The most obvious luxury comparison point. The same architectural approach to dressmaking, the same body-conscious but elevated aesthetic. Sizing runs to UK/EU standard but cut closely — the same advice applies: go by measurements, not the label.
Alex Perry — Another Australian luxury brand with a very similar design DNA to Rebecca Vallance. Structured, glamorous, impeccably made. Worth knowing if you love one and want to explore the other.

Independent & Left-Field Picks

Galvan London — A British independent brand making some of the most quietly spectacular occasion wear available. Satin bias-cut pieces, clean lines, understated glamour. The kind of brand that serious dressers know about and everyone else is about to discover. True to size and available at Selfridges and their own site.
Suzannah London — A British couture-adjacent brand beloved by those in the know for wedding and occasion dressing of genuine distinction. Beautifully made, often bespoke, and an alternative to Rebecca Vallance for women who want something truly individual. One of my personal favourites for special occasions.

Get Your Rebecca Vallance Size Right — Use Tellar First

With a brand as precisely cut as Rebecca Vallance, getting your size wrong before you buy is a genuinely expensive mistake. That's exactly the problem Tellar.co.uk solves — the UK's leading free sizing tool, matching your exact measurements to 1,500+ brands in seconds.

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