What Is Sizing Like at Savannah Miller?

Savannah Miller sizing for bridal gowns run small aso you'll usually need to order two to three sizes up , but ready-to-wear — the much-loved Nine by Savannah Miller is true to size/generous

Savannah Miller sizing comes in two very different flavours, and knowing which one you're buying is half the battle. Her luxury bridal gowns run small and follow traditional bridal sizing, so you'll usually need to order two to three sizes up from your everyday dress size. Her ready-to-wear — the much-loved Nine by Savannah Miller diffusion line — fits true to standard UK womenswear, occasionally a touch generous. Get those two straight and you'll never be caught out.

The two sides of Savannah Miller

If you've fallen for Savannah Miller, it helps to know who she is. She's the British designer (and, yes, Sienna's sister) who cut her teeth at Alexander McQueen and Matthew Williamson before launching her own bridal label in 2016. Think 1930s Hollywood glamour, bias-cut silk and an understated bohemian edge — gowns for the bride who doesn't want to look like everyone else.

Alongside the bridal world sits her accessibly-priced ready-to-wear, designed under the Nine name. The two fit completely differently, so I've split them out below.

Savannah Miller Bridal: how it really fits

Bridal sizing is its own universe, and Savannah Miller is no exception. These gowns are cut on the small side and to traditional bridal measurements — which run smaller than the high street.

Size up, always. Most brides take their gown two to three sizes larger than their everyday clothes. A regular UK 12 will often land on a bridal 16. Don't panic at the number on the label — it means nothing on your big day.
Bias-cut styles are honest. Her signature silk-satin slip silhouettes skim and cling, so they show every contour through the hip and tummy. Beautiful, but unforgiving — go by your fullest measurement.
It's order-only. Gowns are bought through stockist boutiques with a 16–20 week lead time, then fitted to you. Alterations are expected, so a slightly larger order is the safer bet.
Bust support is built in. Many styles have boned, corseted bodices, which means the bust often fits more precisely than soft high-street dresses — measure carefully here.

Nine by Savannah Miller: the everyday fit

The ready-to-wear is a different animal entirely — relaxed, wearable, smart-casual pieces that go from desk to dinner.

True to UK sizing. Sold in standard UK 8–18, it fits as you'd expect for high-street womenswear.
Often a little generous. I've seen resale dresses where a size 8 comfortably fits a 10. If you're between sizes, size down before you size up.
Easy, forgiving shapes. Fit-and-flare and floaty cuts mean there's room to breathe — great if your waist and hips sit in different sizes.

My honest styling take

I learned the bridal-sizing lesson the hard way — though thankfully not on my own wedding. A bride I was styling years ago ordered a gorgeous bias-cut gown in her "normal" size out of sheer stubbornness, then spent the final fitting being painfully laced in. We rescued it, but only just. The flip side? I once grabbed a Nine slip dress in my usual size for a summer party and it was so generous I had to belt it — a far happier problem. The rule I now swear by: with anything cut on the bias or labelled bridal, trust the measurements, not the number.

Where to shop for the Savannah Miller look

If you love the bias-cut, effortlessly elegant aesthetic but want options across the price spectrum, here's where I'd send you.

High street

Whistles — my first stop for slip dresses and modern bridal separates; clean, grown-up cuts that nail the understated vibe.
Reiss — beautifully tailored occasion dresses with a polished, expensive-looking finish.
Phase Eight — the wedding-guest specialist, with flattering occasion silhouettes and reliable sizing.
Coast — go-to for affordable evening gowns and bridesmaid-worthy styles.
Monsoon — embellished, bohemian occasionwear with a romantic, floaty feel.
Anthropologie — the boho-romantic queen for textured, free-spirited dresses.
Hush — effortless, laid-back elegance in easy, throw-on shapes.
Mint Velvet — relaxed luxe; lovely drapey fabrics for understated occasion looks.

Premium

Ghost — the original bias-cut slip dress brand; if you want the Savannah Miller silhouette for a fraction of the price, start here.
Sézane — French-girl romance with vintage-inspired dresses and a similar timeless feel.

Luxury / designer

Totême — minimalist Scandi luxury; pared-back, beautifully made pieces for the understated bride or guest.
By Malene Birger — directional, elegant evening and occasionwear with a fashion-forward edge.

Two independents worth knowing

RIXO — the cult London label for bias-cut, vintage-print dresses that feel romantic and one-of-a-kind.
Halfpenny London — independent British bridal designer doing separates and soft, modern gowns very much in Savannah's world.

How to nail your size every single time

Bridal sizing, diffusion sizing, vanity sizing — it's a minefield, and it's exactly why we built Tellar.

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