Uniqlo to Reiss clothing size
The short answer
Uniqlo L is Reiss 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 | Reiss, by chart | Same label | Reiss builds it for | Reiss also prints |
|---|---|---|---|---|---|
| XS | bust 28.7 to 31.1 in, waist 22.4 to 24.8 in, hip 31.5 to 33.9 in | 4 | not published | bust 31 in, waist 24 in, hip 34 in | US 0 · Letter XS · FR 34 · IT 36 · AU 4 · EU (as printed) 32 |
| S | bust 30.3 to 32.7 in, waist 24 to 26.4 in, hip 33.1 to 35.4 in | 4 or 6 | not published | bust 31 in, waist 24 in, hip 34 in | US 0 · Letter XS · FR 34 · IT 36 · AU 4 · EU (as printed) 32 |
| M | bust 31.9 to 34.3 in, waist 25.6 to 28 in, hip 34.7 to 37 in | 8 | not published | bust 33 in, waist 26 in, hip 36 in | US 4 · Letter S · FR 38 · IT 40 · AU 8 · EU (as printed) 36 |
| 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 35 in, waist 28 in, hip 38 in | US 6 · Letter S · FR 40 · IT 42 · AU 10 · EU (as printed) 38 |
| XL | bust 35.8 to 38.2 in, waist 29.5 to 31.9 in, hip 38.6 to 40.9 in | 12 | not published | bust 37 in, waist 30 in, hip 40 in | US 8 · Letter M · FR 42 · IT 44 · AU 12 · EU (as printed) 40 |
| XXL | bust 38.2 to 40.6 in, waist 31.9 to 34.3 in, hip 40.9 to 43.3 in | 14 | not published | bust 39 in, waist 31.5 in, hip 42 in | US 10 · Letter M · FR 44 · IT 46 · AU 14 · EU (as printed) 42 |
| 3XL | bust 40.6 to 42.9 in, waist 34.3 to 36.6 in, hip 43.3 to 45.7 in | 16 or 18 | not published | bust 41 in, waist 33.5 in, hip 44 in | US 12 · Letter L · FR 46 · IT 48 · AU 16 · EU (as printed) 44 |
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
- Reiss size guide, read on 2026-09-18.