Uniqlo to Whistles clothing size
The short answer
Uniqlo L is Whistles 10 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.
| Uniqlo Japan sizing | Uniqlo builds it for | Whistles, by chart | Same label | Whistles builds it for | Whistles also prints |
|---|---|---|---|---|---|
| XS | bust 28.7 to 31.1 in, waist 22.4 to 24.8 in, hip 31.5 to 33.9 in | 04 | not published | bust 30 in, waist 23.5 in, hip 34.5 in | not published |
| S | bust 30.3 to 32.7 in, waist 24 to 26.4 in, hip 33.1 to 35.4 in | 06 or 08 | not published | bust 31 in, waist 24.5 in, hip 35.5 in | not published |
| M | bust 31.9 to 34.3 in, waist 25.6 to 28 in, hip 34.7 to 37 in | 10 or 08 | not published | bust 34 in, waist 27.5 in, hip 38.5 in | not published |
| L | bust 33.5 to 35.8 in, waist 27.2 to 29.5 in, hip 36.2 to 38.6 in | 10 | not published | bust 34 in, waist 27.5 in, hip 38.5 in | not published |
| XL | bust 35.8 to 38.2 in, waist 29.5 to 31.9 in, hip 38.6 to 40.9 in | 14 or 12 | not published | bust 38 in, waist 31.5 in, hip 42.5 in | not published |
| XXL | bust 38.2 to 40.6 in, waist 31.9 to 34.3 in, hip 40.9 to 43.3 in | 16 | not published | bust 40 in, waist 33.5 in, hip 44.5 in | not published |
| 3XL | bust 40.6 to 42.9 in, waist 34.3 to 36.6 in, hip 43.3 to 45.7 in | 18 | not published | bust 42.5 in, waist 35.5 in, hip 46.5 in | 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
- Uniqlo Japan sizing size guide, read on 2026-09-25. Uniqlo on TrueToSize
- Whistles size guide, read on 2026-09-18.