Arc'teryx to GU clothing size
The short answer
Arc'teryx XS is GU M by the two brands' own charts. 5 of 5 Arc'teryx sizes land on a different label at GU.
Both brands publish the body bust each size is cut for, so every row matches a bust, not a letter or a number.
On 5 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.
| Arc'teryx | Arc'teryx builds it for | GU Japan sizing, by chart | Same label | GU builds it for | GU also prints |
|---|---|---|---|---|---|
| XS | bust 33.1 in, waist 26.8 in, hip 36.2 in | M | XS | bust 31.5 to 33.5 in, waist 24.8 to 26.4 in, hip 33.5 to 35 in | not published |
| S | bust 35 in, waist 28.7 in, hip 38.2 in | L | S | bust 33.5 to 35.4 in, waist 26.4 to 28 in, hip 35 to 36.6 in | not published |
| M | bust 37 in, waist 30.7 in, hip 40.2 in | XL | M | bust 35.4 to 37.8 in, waist 28 to 30.3 in, hip 36.6 to 38.6 in | not published |
| L | bust 40.2 in, waist 33.9 in, hip 43.3 in | XXL | L | bust 37.8 to 40.2 in, waist 30.3 to 32.7 in, hip 38.6 to 40.6 in | not published |
| XL | bust 44.1 in, waist 37.8 in, hip 47.2 in | 3XL | XL | bust 40.2 to 43.3 in, waist 32.7 to 35.4 in, hip 40.6 to 43.3 in | not published |
| XXL | bust 48 in, waist 41.7 in, hip 51.2 in | not made | XXL | 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
- Arc'teryx size guide, read on 2026-09-18.
- GU Japan sizing size guide, read on 2026-09-25.