MUJI to lululemon clothing size
The short answer
MUJI XS is lululemon XXS by the two brands' own charts. 6 of 6 MUJI sizes land on a different label at lululemon.
Both brands publish the body bust each size is cut for, so every row matches a bust, not a letter or a number.
| MUJI Japan sizing | MUJI builds it for | lululemon, by chart | Same label | lululemon builds it for | lululemon also prints |
|---|---|---|---|---|---|
| XS | bust 28.7 to 30.3 in, waist 22.1 to 23.6 in, hip 31.9 to 33.5 in | XXS | XS | bust 30 in | US 2 |
| S | bust 29.5 to 31.9 in, waist 22.8 to 25.2 in, hip 32.7 to 35 in | XS or XXS | S | bust 31 to 32 in | US 4 |
| M | bust 31.5 to 33.9 in, waist 24.8 to 27.2 in, hip 34.7 to 37 in | S or XS | M | bust 33 to 34 in | US 6 |
| L | bust 33.5 to 35.8 in, waist 26.8 to 29.1 in, hip 36.6 to 39 in | M or S | L | bust 35 to 36 in | US 8 |
| XL | bust 35.4 to 37.8 in, waist 28.7 to 31.1 in, hip 38.6 to 40.9 in | L or M | XL | bust 37 to 38.5 in | US 10 |
| XXL | bust 37.4 to 39.8 in, waist 30.7 to 33.1 in, hip 40.6 to 42.9 in | L | not published | bust 37 to 38.5 in | US 10 |
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
- MUJI Japan sizing size guide, read on 2026-09-25.
- lululemon size guide, read on 2026-09-18. lululemon on TrueToSize