Lululemon to Uniqlo clothing size
The short answer
lululemon XXXS is Uniqlo XS by the two brands' own charts. 7 of 7 lululemon sizes land on a different label at Uniqlo.
Both brands publish the body bust each size is cut for, so every row matches a bust, not a letter or a number.
On 1 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.
| lululemon | lululemon builds it for | Uniqlo Japan sizing, by chart | Same label | Uniqlo builds it for | Uniqlo also prints |
|---|---|---|---|---|---|
| XXXS | bust 28.5 in | XS | not published | bust 28.7 to 31.1 in, waist 22.4 to 24.8 in, hip 31.5 to 33.9 in | JP 5 |
| XXS | bust 30 in | XS | not published | bust 28.7 to 31.1 in, waist 22.4 to 24.8 in, hip 31.5 to 33.9 in | JP 5 |
| XS | bust 31 to 32 in | S | XS | bust 30.3 to 32.7 in, waist 24 to 26.4 in, hip 33.1 to 35.4 in | JP 7 |
| S | bust 33 to 34 in | M | S | bust 31.9 to 34.3 in, waist 25.6 to 28 in, hip 34.7 to 37 in | JP 9 |
| M | bust 35 to 36 in | L | M | bust 33.5 to 35.8 in, waist 27.2 to 29.5 in, hip 36.2 to 38.6 in | JP 11 |
| L | bust 37 to 38.5 in | XL | L | bust 35.8 to 38.2 in, waist 29.5 to 31.9 in, hip 38.6 to 40.9 in | JP 13 |
| XL | bust 40 to 42 in | 3XL | XL | bust 40.6 to 42.9 in, waist 34.3 to 36.6 in, hip 43.3 to 45.7 in | JP 17 |
| 1X | bust 45 to 47 in | not made | not published | not published | not published |
| 2X | bust 49 to 51 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
- lululemon size guide, read on 2026-09-18. lululemon on TrueToSize
- Uniqlo Japan sizing size guide, read on 2026-09-25. Uniqlo on TrueToSize