What Is Sizing Like at Tiffany Rose? A Stylist’s Honest Fit Guide

By Ella Blake – Senior fashion stylist & Founder | Tellar – Always honest, unbiased, & unsponsored post

Tiffany Rose runs true to your pre-pregnancy size – the brand’s own golden rule is to order the size you wore before you fell pregnant, because every piece is cut specifically for a bump and the stretch styles are engineered to grow with you through every trimester. So if you were a UK 12 before the bump, a UK 12 is almost always your starting point. That said, there are a couple of fabric-related quirks worth knowing before you part with your money, and I’ll walk you through all of them.

The short answer on fit

Tiffany Rose is a British luxury label that has been making occasion maternity wear since the early 2000s, and the sizing is genuinely well thought through. I’ve styled enough pregnant clients for weddings and christenings to tell you that “maternity” sizing is wildly inconsistent across the market – but Tiffany Rose is one of the more reliable ones. The headline points:

Order your pre-pregnancy size. The brand drafts in extra room across the bump as standard, so you don’t need to go up.
Stretch jersey styles will see you from early pregnancy right through to term. These are your safest bet if you’re buying ahead.
Bust is the measurement to prioritise, especially in silk and chiffon. Your cup size will likely change before anything else does.
Reviews are largely positive on fit, though a handful of customers mention the odd inconsistency – so always check the specific style, not just the brand.

Stretch vs non-stretch – the bit most people miss

This is where the real fit decision lives. Tiffany Rose splits into two camps, and they behave completely differently:

Stretch fabrics (jersey): forgiving, flexible and bump-friendly. Stick to your pre-pregnancy size and trust it.
Non-stretch fabrics (silk, chiffon): there’s no give, so the tailoring is doing all the work. Here the brand advises ordering your pre-pregnancy size no more than around 12 weeks before you’ll wear it, and to let your bust measurement lead. If your chest has already grown a lot, that’s the number to respect.

I once had a client order a structured silk gown at 20 weeks for an event at 36 weeks – rookie error, because by the time the day came her bust had jumped two cup sizes and the bodice was straining. With the jersey styles, that simply wouldn’t have happened. Lesson learned: match the fabric to how far out you are.

Where it can catch you out

Length. If you’re petite (5ft 3in and under), expect maxi styles to puddle, even with a bump lifting the front hem. Factor in a heel or a small alteration.
Bust again. I can’t say it enough – in occasionwear, the bust seam is the thing that fails first. Measure it the week you order, not the week you bought the dress.
Post-partum. If you’re buying for after the baby arrives, fit depends entirely on your recovery, so go by current measurements rather than a guess.

Where to shop – my brand recommendations

Tiffany Rose sits at the luxury end, so here’s how I’d build out the rest of an occasion maternity wardrobe across budgets.

High street

ASOS – the ASOS Maternity edit is huge and brilliant for trend-led occasion dresses at a fraction of designer prices.
H&M – the Mama line does elegant, simple jersey pieces that genuinely flatter a bump.
Next – reliably good maternity occasionwear and the sizing is consistent, which matters when you can’t pop into a fitting room.
Monsoon – a long-standing occasionwear specialist with floaty, forgiving cuts that work beautifully over a bump.
Coast – my go-to for wedding-guest dressing on a budget; structured but with enough stretch to be kind.
Phase Eight – grown-up, polished occasion dresses that read far more expensive than they are.
Hobbs – tailored and timeless; ideal if you want something you’ll wear again long after the bump has gone.

Premium

Séraphine – the royal-favourite maternity label; refined, well-cut and a natural step up from the high street.
Isabella Oliver – British, beautifully draped jersey designed to be worn long past pregnancy. Quietly luxurious.

Luxury & designer

Tiffany Rose – the gold standard for British occasion maternity wear; made in the UK, gowns built specifically for special days.
HATCH – the cult New York label with directional, fashion-forward maternity pieces for those who want something less classic.

Two left-field finds

Frances Austen – a small-batch knitwear label doing elevated, bump-friendly pieces that aren’t obviously “maternity” at all.
Bumpsuit – an independent brand making genuinely cool, sculptural pieces; perfect if you want to step away from florals entirely.

How to never guess your size again

Here’s the honest truth: bodies don’t follow charts, and a bump makes that ten times more true. That’s exactly why I built Tellar – the UK’s leading sizing tool that matches your body to over 1,500 brands instantly, so you never have to squint at a size guide again.

Measure once – using your bust, waist, hip, or even your existing size in another brand.
Use the Store Size Lookup to get your precise size in any brand – COS, Reiss, Everlane, Arket and more.
Always free, no downloads, works straight in your browser.

Don’t have a tape measure? Just tell Tellar your usual size in another brand (say, “UK 12 in Séraphine” or “Medium in ASOS Maternity”) and it’ll estimate your Tiffany Rose fit for you.

Find your fit at Tellar.co.uk Try the Store Size Lookup tool

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