Bridesmaid Dress Size Guide

Bridesmaid sizing runs on your largest measurement

Bridesmaid dresses are not bought like ordinary clothes. Nearly every brand's chart assumes one size has to clear your bust, waist and hips at the same time, and those three numbers rarely land in the same column. The industry rule is the largest-measurement rule: order the size that fits your biggest measurement and have the rest taken in. Ordering to your waist because the bust looks close enough is how a dress arrives that will not zip.

Enter your bust, waist and hips in inches or centimetres and select which brands your group is considering. The guide converts your measurements to a recommended size in each, shows where the charts disagree, and warns you when you are sitting between two sizes.

Measuring yourself properly

Four details cause most measurement errors, and all four are easy to avoid.

Measure over the undergarments you intend to wear with the dress — a different bra can move your bust measurement by an inch or more. Keep the tape level and snug but not tight, parallel to the floor at the bust and at the hips. Do not measure yourself, because a tape you are holding in place distorts the number. And measure in the afternoon rather than first thing in the morning, since bodies shift through the day.

If a measurement lands exactly on a boundary between two sizes, treat that as being between sizes rather than on one. The charts are built from averages, so a body on the edge can legitimately go either way.

The five charts, and where they disagree

Azazie, Kennedy Blue, Birdy Grey, David's Bridal and Dessy cover the large majority of bridesmaid parties, and they do not use the same system.

Azazie runs a numerical chart from size 0 upward and offers custom sizing at no extra cost, which makes the standard chart a starting point rather than a verdict. Kennedy Blue also runs numerically but tends to size slightly small, so if you are between sizes you should go up. Birdy Grey uses letter sizes — XS through 3XL — rather than numbers, so a direct comparison with a numerical chart is impossible and your measurements matter far more than the label.

David's Bridal uses a numerical chart many bridesmaids already know from other shopping, which makes it a useful reference point even if you order elsewhere. Dessy is numerical too, and its bust and hip increments differ enough from the others that the same body can land on two different sizes across the five.

That last point is the practical takeaway: expect the charts to disagree. Someone who is a 6 in one system may be an 8 in another, and neither is wrong. They are built from different sets of measurements and cut to different blocks.

Split sizes, and when to go up

When your bust, waist and hips point at different sizes you have three options, and the right one depends on how far apart they are.

If the spread is one size, order to the largest and budget for taking in the other two areas. If the spread is two sizes or more, standard sizing stops being realistic and you should either choose a brand with custom sizing or accept a meaningful alterations bill. Going down is generally harder than going up, because taking a dress in means removing fabric, while letting it out depends on whether the seams carry enough allowance — and that varies by brand and style.

Alterations on a bridesmaid dress commonly run $60 to $150, and a hem plus a bodice take-in is the most frequent combination. If several bridesmaids need work, a group arrangement with one seamstress sometimes reduces the per-dress cost.

Custom sizing versus standard plus alterations

Azazie and a few other brands offer made-to-measure sizing at no additional charge, which changes the arithmetic considerably. Custom sizing removes most of the alterations bill, but it also removes your ability to return the dress, and it adds weeks to the lead time. Standard sizing plus alterations keeps the return option open and is usually faster, at the cost of a seamstress appointment.

The deciding factor is the spread between your three measurements. One size apart, and standard sizing with a take-in is efficient. Two or more apart, and custom sizing stops being a luxury and starts being the cheaper route.

Ordering timelines

Most bridesmaid brands quote eight to twelve weeks for production, and alterations add two to four weeks on top. Working backwards from the wedding, that means ordering four to five months out is comfortable and three months out is tight. If the wedding is inside three months, filter for brands with in-stock or expedited options before you fall in love with a colour.

Order everything at once. Dye lots vary slightly between production runs, so a dress ordered six weeks after the others can arrive in a marginally different shade of the same colour name.

Frequently asked questions

Why is my bridesmaid dress size different from my normal dress size?

Bridesmaid charts are built from body measurements rather than the vanity sizing used in ready-to-wear, and they assume a looser fit. A 6 in everyday clothing can comfortably be an 8 or 10 in a bridesmaid chart.

What is the largest-measurement rule?

Order the size that accommodates your biggest measurement, which is usually the bust or the hips, and have the other areas altered down. Ordering to a smaller measurement is how dresses end up unable to zip.

Should bridesmaids order by size or by custom measurements?

Size, if your three measurements sit within one size of each other. Custom, if the spread is two sizes or more, because the alterations otherwise outweigh the convenience.

Do all bridesmaids have to wear the same size number?

No, and they usually will not. Charts differ between brands and bodies differ between people. Matching fabric and colour is what makes a group look coordinated, not matching labels.

How far in advance should bridesmaids order their dresses?

Four to five months before the wedding is comfortable. Production typically takes eight to twelve weeks and alterations another two to four.

Related planning tools

Ask the bridal party with the Bridesmaid Proposal Ideas Generator and confirm the headcount using the Wedding Party Size Calculator. Cross-check your own measurements with the Dress Size Calculator, budget the fitting costs through the Alterations Cost Estimator, and plan thank-you gifts with the Party Gift Budget Calculator.