Every costume brand names its sizes differently, and rarely means the same thing by "Medium." WildCard size is the one label on every listing that means the same thing no matter who made it: 6 kids' tiers and 7 adult tiers, built from real published brand size charts plus standard US kids' and misses' measurements.
The scale and the estimate tool are a guide, not a fit guarantee. Brands vary, and the final size choice is yours, so compare the seller's size details with your dancer's own measurements before you buy.

Enter height, weight, and age for a WildCard size estimate. For fitted or higher-value costumes, compare girth and the seller's size details before purchasing. This is an estimate, not a guarantee of fit.
Enter height to get a size estimate.
| WildCard size | Roughly fits |
|---|---|
| CXXS | Bust 19" |
| CXS | Height 42-45" · about age 4-5 |
| CS | Height 46-49" · about age 5-6 |
| CM | Height 50-53" · about age 7-8 |
| CL | Height 54-58" · about age 8-10 |
| CXL | Height 58-62" · about age 10-12 |
| AXS | Bust 32-33" |
| AS | Bust 34-35" |
| AM | Bust 36-37" |
| AL | Bust 38-40" |
| AXL | Bust 41-43" |
| AXXL | Bust 44-46" |
| A3XL | Bust 50" |
Nearly every costume brand we researched (Weissman, Kellé, Revolution, Glamour, Pumpers, Jo+Jax, Bloch, Kandi Kouture) calls girth: a loop measurement that runs from one shoulder, down through the body, and back up to the other shoulder, front and back, the single most reliable fit measurement, more so than bust, waist, or hip alone. If you're between two sizes on a snug or higher-value piece, girth is worth double-checking before you buy or list.
For custom pieces, or anything without a known brand size, sellers can convert from their dancer's normal clothing size instead, costumes typically fit snugger, so we size up slightly from streetwear.
| Everyday clothing size | WildCard size |
|---|---|
| 2T-3T | CXS |
| 4-5 | CXS |
| 6-6X | CS |
| 7-8 | CM |
| 10-12 | CL |
| 14-16 | CXL |
| Adult XS | AXS |
| Adult S | AS |
| Adult M | AM |
| Adult L | AL |
| Adult XL | AXL |
| Adult XXL | AXXL |
Built from each brand's own published size chart where we could find one. Brands without a public chart yet default sellers to the custom/streetwear-size path above instead of a guess.