Athleta to MUJI clothing size
The short answer
Athleta XXS is MUJI S by the two brands' own charts. 5 of 5 Athleta sizes land on a different label at MUJI.
Both brands publish the body bust each size is cut for, so every row matches a bust, not a letter or a number.
On 4 sizes the charts land two or more sizes from the same label. Brands do not measure the body the same way, so on those rows treat the chart answer and the same label as the two ends of a range.
| Athleta | Athleta builds it for | MUJI Japan sizing, by chart | Same label | MUJI builds it for | MUJI also prints |
|---|---|---|---|---|---|
| XXS | bust 31.5 in, waist 24.3 in, hip 34 in | S | not published | bust 29.5 to 31.9 in, waist 22.8 to 25.2 in, hip 32.7 to 35 in | not published |
| XS | bust 32.5 to 33.5 in, waist 25.3 to 26.3 in, hip 35 to 36 in | M | XS | bust 31.5 to 33.9 in, waist 24.8 to 27.2 in, hip 34.7 to 37 in | not published |
| S | bust 34.5 to 35.5 in, waist 27.3 to 28.3 in, hip 37 to 38 in | L | S | bust 33.5 to 35.8 in, waist 26.8 to 29.1 in, hip 36.6 to 39 in | not published |
| M | bust 36.5 to 37.5 in, waist 29.3 to 30.3 in, hip 39 to 40 in | XL | M | bust 35.4 to 37.8 in, waist 28.7 to 31.1 in, hip 38.6 to 40.9 in | not published |
| L | bust 39 to 40.5 in, waist 31.8 to 33.3 in, hip 41.5 to 43 in | XXL | L | bust 37.4 to 39.8 in, waist 30.7 to 33.1 in, hip 40.6 to 42.9 in | not published |
| XL | bust 42 in, waist 34.3 in, hip 44.5 in | not made | XL | not published | not published |
| 1X | bust 44.3 to 46.3 in, waist 38 to 40 in, hip 47.3 to 49.3 in | not made | not published | not published | not published |
| 2X | bust 48.3 to 50.8 in, waist 42 to 44.5 in, hip 51.3 to 53.8 in | not made | not published | not published | not published |
| 3X | bust 53.3 to 55.8 in, waist 47 to 49.5 in, hip 56.3 to 58.8 in | not made | not published | not published | not published |
What wearers say
Charts describe a garment, not a fit. We do not collect fit reports for this category yet, so this table is the two brands' own claims and nothing more.
Sources
- Athleta size guide, read on 2026-09-18. Athleta on TrueToSize
- MUJI Japan sizing size guide, read on 2026-09-25.