MUJI to Banana Republic size
The short answer
MUJI XS is Banana Republic XXS by the two brands' own charts. 6 of 6 MUJI sizes land on a different label at Banana Republic.
Both brands publish the body chest each size is cut for, so every row matches a chest, not a letter.
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.
| MUJI Japan sizing | MUJI builds it for | Banana Republic, by chart | Same label | Banana Republic builds it for | Banana Republic also prints |
|---|---|---|---|---|---|
| XS | chest 29.9 to 33.1 in, waist 25.2 to 28.4 in, hip 30.7 to 33.9 in | XXS | XS | chest 32 to 33 in, waist 25 to 26 in, neck 13 to 13.5 in, sleeve 31 in | not published |
| S | chest 31.5 to 34.7 in, waist 26.8 to 29.9 in, hip 32.3 to 35.4 in | XXS | S | chest 32 to 33 in, waist 25 to 26 in, neck 13 to 13.5 in, sleeve 31 in | not published |
| M | chest 34.7 to 37.8 in, waist 29.9 to 33.1 in, hip 35.4 to 38.6 in | S | M | chest 36 to 37 in, waist 29 to 31 in, neck 14 to 14.5 in, sleeve 33 in | not published |
| L | chest 37.8 to 40.9 in, waist 33.1 to 36.2 in, hip 38.6 to 41.7 in | M | L | chest 38 to 40 in, waist 32 to 33 in, neck 15 to 15.5 in, sleeve 34 in | not published |
| XL | chest 40.9 to 44.1 in, waist 36.2 to 39.4 in, hip 41.7 to 44.9 in | L | XL | chest 41 to 44 in, waist 34 to 35 in, neck 16 to 16.5 in, sleeve 35 in | not published |
| XXL | chest 44.1 to 47.2 in, waist 39.4 to 42.5 in, hip 44.9 to 48 in | XL | XXL | chest 45 to 48 in, waist 36 to 37 in, neck 17 to 17.5 in, sleeve 35.5 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
- MUJI Japan sizing size guide, read on 2026-09-25.
- Banana Republic size guide, read on 2026-09-18.