Prom designers make more sizes than most store racks suggest. The hard part is rarely whether a label cuts your size. It is whether a shop near you has that size hanging up, ready to try on.
This page covers the size ranges the big prom labels actually publish, how to find a shop that stocks your size, what happens when you have to order, and where alterations come in. None of it is about changing your body. It is about finding a dress that fits the one you have.
What sizes prom labels make
Every prom label publishes its own size chart, and the ranges differ more than you might expect. Here is what several of the most widely carried labels list on their own websites, checked in October 2026.
| Label | Size range on its own site | Worth knowing |
|---|---|---|
| Sherri Hill | 000 to 26 | The company says not every style is made in every size |
| Jovani | 00 to 24 | Runs a separate plus size prom collection in sizes 14 to 24 |
| Ashley Lauren | 00 to 30 on its standard chart | One prom style we checked was offered only up to 16 |
| Johnathan Kayne | 000 to 24 | Lists a hollow-to-hem length on its chart too |
| Faviana | 00 through 24W | Stated on the company page about its founders |
| Mac Duggal | 0 to 26 across its online prom collection | Also sells petite sizes |
Two things stand out. First, a label's range is not the same as a style's range. Sherri Hill says plainly that not every style is produced in every size, and its size guide notes that each style's own page lists the sizes it comes in. Check the dress, not just the brand.
Second, some labels design only for larger sizes. Sydney's Closet describes itself on its own site as plus size special occasion dresses in sizes 14 to 40, and several shops listed here carry it alongside the bigger names.
Your chart size is not your jeans size
Formal sizes run smaller than everyday clothes. Sherri Hill's size guide says most people wear one to two sizes larger in its gowns than in their jeans or streetwear, and adds that this is normal and "isn't a reflection of your everyday size."
So if an 18 fits and you wear a 14 in jeans, nothing is wrong. The chart is just built differently. Other labels use their own charts, so the gap can change from one designer to the next. Our page on prom dress sizing shows how to measure and how the charts compare.
Why trying on matters
Prom gowns are structured. Boning, beading and fitted bodices leave very little give, so a dress that matches your numbers on paper can still pull at the bust or sit oddly at the hip. Two minutes in a fitting room tells you what no chart can.
Trying on also teaches you how different shapes work on you. Sherri Hill's fit guide explains that a mermaid gown is fitted through bust, waist and hips alike, while A-line and ball gown skirts leave room through the hips, and an empire waist depends mostly on the bust. You do not have to choose a shape anyone calls flattering. Just know which styles give you room where you want it.
And notice how a shop treats you. A good stylist pulls dresses in your size without being asked twice. If a shop makes you feel rushed or judged, that is a reason to leave. It is not a reason to doubt yourself.
Call the shop before you go
This is the most useful thing you can do. Stock changes fast in spring, and a five-minute call can save you a wasted trip. Ask:
- What sizes do you have in prom dresses on the floor right now?
- Is there a plus size section, or are larger sizes mixed in with everything else?
- Which designers do you stock in my size?
- If I book an appointment, can you pull dresses in my size before I arrive?
- If I love a style you do not have in my size, can you order it, how long will it take, and does it cost more?
Some shops answer this up front. Amanda's Touch, a Virginia shop listed here, says on its prom page that its sizes run from 000 to 30, and adds, "Yes, we have plus size prom dresses!" That is the kind of plain answer worth looking for on a shop's website.
What this site can tell you, and what it cannot yet
To be straight with you, we do not yet track which shops stock extended sizes. Our store pages report what each shop's own website says, and some mention a plus size section or a size range. But we cannot yet filter shops by the sizes they carry. Until we can, a phone call is the reliable way to know.
You can browse prom shops by state and start with the ones nearest you, or begin from the designer label pages if you already know which lines run in your size.
Ordering a size the shop does not stock
If the shop does not have your size, it can usually order it. Sherri Hill's FAQ says that when your size is not in the store, the retailer can check whether it is available to order. That makes it a special order, and three things come with it.
Time. Prom Headquarters, a South Carolina shop listed on this site, tells customers that average production time is three to four months and that it cannot rush an order. If you are ordering, start early. Our prom dress shopping timeline works backward from your date.
Cost. Some designers charge more for larger sizes. The same shop's FAQ explains an extra size fee applied to some garments in size 18 and over, because of the extra fabric they take. Not every label or shop charges one. Ask before you order, so the price you see is the price you pay.
Returns. Special orders are often final. Prom Headquarters says orders placed through its vendors cannot be exchanged or returned. Measure carefully, and have the shop confirm your size before you pay.
Alterations
Almost every prom dress gets altered, in every size. Sherri Hill's guide says nearly every formal gown is finished by a seamstress, because off-the-rack dresses are cut to a chart rather than to a person.
The rule that matters most is that taking a dress in is much easier than letting it out. Sherri Hill notes that seam allowances are small, so a gown can be let out only a little, if at all. That is why its advice is to choose the size that fits your largest measurement and have the rest taken in.
Bust support is worth raising with your tailor. Cups, wider straps or extra boning can often be added. Beading slows any job down, since beads have to come off and be sewn back on around a new seam, so give an embellished gown extra time.
When shopping gets frustrating
It can. A rack that stops at 16 is a stocking decision, not a verdict on you. The labels above make far more sizes than many stores keep on hand. Call ahead, bring someone who makes you laugh, and walk out of any shop that treats you like a problem to solve. The right dress is out there, and so is the right shop.