Patagonia to GU size
The short answer
Patagonia XXS is GU S by the two brands' own charts. 7 of 7 Patagonia sizes land on a different label at GU.
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.
| Patagonia | Patagonia builds it for | GU Japan sizing, by chart | Same label | GU builds it for | GU also prints |
|---|---|---|---|---|---|
| XXS | chest 33 in, hip 32 in, sleeve 30 in | S | not published | chest 31.5 to 34.7 in, waist 26.8 to 29.9 in | not published |
| XS | chest 35 in, hip 34 in, sleeve 32 in | M | XS | chest 34.7 to 37.8 in, waist 29.9 to 33.1 in | not published |
| S | chest 37 in, hip 36 in, sleeve 33 in | M | S | chest 34.7 to 37.8 in, waist 29.9 to 33.1 in | not published |
| M | chest 40 in, hip 39 in, sleeve 34 in | L | M | chest 37.8 to 40.9 in, waist 33.1 to 36.2 in | not published |
| L | chest 44 in, hip 43 in, sleeve 35 in | XL | L | chest 40.9 to 44.1 in, waist 36.2 to 39.4 in | not published |
| XL | chest 47 in, hip 46 in, sleeve 36 in | XXL | XL | chest 44.1 to 47.2 in, waist 39.4 to 42.5 in | not published |
| XXL | chest 50 in, hip 49 in, sleeve 37 in | 3XL | XXL | chest 47.2 to 50.4 in, waist 42.5 to 45.7 in | not published |
| XXXL | chest 56 in, hip 55 in, sleeve 37.5 in | not made | 3XL | 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
- Patagonia size guide, read on 2026-09-18.
- GU Japan sizing size guide, read on 2026-09-25.