GU to Farm Rio clothing size
The short answer
GU XS is Farm Rio XXS by the two brands' own charts. 7 of 7 GU sizes land on a different label at Farm Rio.
Both brands publish the body bust each size is cut for, so every row matches a bust, not a letter or a number.
On 4 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.
| GU Japan sizing | GU builds it for | Farm Rio, by chart | Same label | Farm Rio builds it for | Farm Rio also prints |
|---|---|---|---|---|---|
| XS | bust 27.6 to 29.5 in, waist 21.3 to 23.2 in, hip 30.3 to 31.9 in | XXS | XS | bust 30 to 31 in, waist 24 to 25 in, hip 33 to 34 in | US 00 · UK 2 · EU (as printed) 30 |
| S | bust 29.5 to 31.5 in, waist 23.2 to 24.8 in, hip 31.9 to 33.5 in | XXS | S | bust 30 to 31 in, waist 24 to 25 in, hip 33 to 34 in | US 00 · UK 2 · EU (as printed) 30 |
| M | bust 31.5 to 33.5 in, waist 24.8 to 26.4 in, hip 33.5 to 35 in | XS | M | bust 32 to 33 in, waist 26 to 27 in, hip 35 to 36 in | US 0-2 · UK 4-6 · EU (as printed) 32-34 |
| L | bust 33.5 to 35.4 in, waist 26.4 to 28 in, hip 35 to 36.6 in | S | L | bust 34 to 35 in, waist 28 to 29 in, hip 37 to 38 in | US 4-6 · UK 8-10 · EU (as printed) 36-38 |
| XL | bust 35.4 to 37.8 in, waist 28 to 30.3 in, hip 36.6 to 38.6 in | M | XL | bust 36 to 37 in, waist 30 to 31 in, hip 39 to 40 in | US 8-10 · UK 12-14 · EU (as printed) 40-42 |
| XXL | bust 37.8 to 40.2 in, waist 30.3 to 32.7 in, hip 38.6 to 40.6 in | L | not published | bust 38 to 40 in, waist 32 to 34 in, hip 41 to 43 in | US 12-14 · UK 16-18 · EU (as printed) 44-46 |
| 3XL | bust 40.2 to 43.3 in, waist 32.7 to 35.4 in, hip 40.6 to 43.3 in | XL | not published | bust 41 to 44 in, waist 35 to 37 in, hip 44 to 46 in | US 16 · UK 20 · EU (as printed) 48 |
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
- GU Japan sizing size guide, read on 2026-09-25.
- Farm Rio size guide, read on 2026-09-18.