Whistles to MUJI clothing size
The short answer
Whistles 10 is MUJI L by the two brands' own charts.
Both brands publish the body bust each size is cut for, so every row matches a bust, not a letter or a number.
| Whistles | Whistles builds it for | MUJI Japan sizing, by chart | Same label | MUJI builds it for | MUJI also prints |
|---|---|---|---|---|---|
| 04 | bust 30 in, waist 23.5 in, hip 34.5 in | XS | not published | bust 28.7 to 30.3 in, waist 22.1 to 23.6 in, hip 31.9 to 33.5 in | not published |
| 06 | bust 31 in, waist 24.5 in, hip 35.5 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 |
| 08 | bust 32 in, waist 25.5 in, hip 36.5 in | M | not published | bust 31.5 to 33.9 in, waist 24.8 to 27.2 in, hip 34.7 to 37 in | not published |
| 10 | bust 34 in, waist 27.5 in, hip 38.5 in | L | not published | bust 33.5 to 35.8 in, waist 26.8 to 29.1 in, hip 36.6 to 39 in | not published |
| 12 | bust 36 in, waist 29.5 in, hip 40.5 in | XL | not published | bust 35.4 to 37.8 in, waist 28.7 to 31.1 in, hip 38.6 to 40.9 in | not published |
| 14 | bust 38 in, waist 31.5 in, hip 42.5 in | XXL | not published | bust 37.4 to 39.8 in, waist 30.7 to 33.1 in, hip 40.6 to 42.9 in | not published |
| 16 | bust 40 in, waist 33.5 in, hip 44.5 in | XXL | not published | bust 37.4 to 39.8 in, waist 30.7 to 33.1 in, hip 40.6 to 42.9 in | not published |
| 18 | bust 42.5 in, waist 35.5 in, hip 46.5 in | not made | not published | not published | not published |
| 20 | bust 45 in, waist 38 in, hip 49 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
- Whistles size guide, read on 2026-09-18.
- MUJI Japan sizing size guide, read on 2026-09-25.