Size guides

What size bridesmaid dress should I order?

Everyone tells you bridesmaid dresses run small. We checked four brands' published charts against street sizing, and that advice is wrong for half of them — in a way that will cost you a dress if you follow it.

By Sulaimon Salako, CEO of Styla · 27 July 2026 · 4 min read · How we source our data

This is the highest-stakes sizing decision most people ever make. The dress is often made to order, the deadline is fixed, and you usually can't return it. So it's worth knowing that the single most repeated piece of advice in this category — size up, bridal runs small — is not supported by the charts.

And if you've already measured yourself carefully and the number the chart gave you looked wrong, you're not misreading it. These four brands genuinely disagree about what your body is.

The same bust, four different sizes

Here's a 36-inch bust, run through each brand's own published chart, with a mainstream dress size for comparison:

Read the last two rows together. Azazie needs a larger number than your street size. Kennedy Blue needs a smaller one. They run in opposite directions.

The pattern holds further up the range. At a 38″ bust: Kennedy Blue is a size 8, while Azazie is an A12 and David's Bridal a 12. That's a four-size spread across brands selling the same category of garment.

Why "bridal runs small" got repeated anyway

Because it's true of wedding gowns, which is a different product. Bridal gown sizing descends from decades-old pattern blocks and genuinely runs one to two sizes below street. Bridesmaid brands are mostly modern, mostly direct-to-consumer, and set their own grids — some conservative, some generous.

The advice got copied across from gowns to bridesmaids and nobody checked. It's now on hundreds of pages and in a great many forum replies.

Range and coverage matter as much as the number

Birdy Grey's chart jumps from XXL, which stops at a 43″ bust, to 1X, which starts at 46″. If your bust is 44 or 45 inches, Birdy Grey doesn't publish a size that fits you. Not a size that's slightly off — no size. That gap sits exactly where straight sizing ends and plus sizing begins, which is the worst-served stretch of the whole market.

Nine sizes across a 21-inch range also means wide steps between sizes, so even inside the range you're more likely to land between two.

If you're ordering for a whole party

Three things worth doing differently from the standard advice:

Don't order everyone to the largest bridesmaid's measurement. This gets recommended constantly. It produces a dress that fits one point on one body and taxes everyone else with alterations — usually the bustiest and widest-hipped members of the party, who are already the least well served.

Measure everyone to the same standard. A party measured by six different people with six different techniques will produce six differently-wrong numbers. This is a data quality problem more than a sizing one. Same instructions, same tape, arms down, and write down who measured whom.

Convert each person individually, then decide on alterations. "It's easier to take in than let out" is only true of side seams. It's false for shoulders, armholes, necklines and most bodice construction — which is how people end up in a dress that fits nowhere.

And check the calendar against the brand, not the average. Made-to-order lead times differ by brand and Azazie has recommended ordering roughly four months ahead. Alterations need weeks on top of that.