Arc'teryx to Reformation clothing size
The short answer
Arc'teryx XL is Reformation 1X by the two brands' own charts. 2 of 6 Arc'teryx sizes land on a different label at Reformation.
Both brands publish the body bust each size is cut for, so every row matches a bust, not a letter or a number.
| Arc'teryx | Arc'teryx builds it for | Reformation, by chart | Same label | Reformation builds it for | Reformation also prints |
|---|---|---|---|---|---|
| XS | bust 33.1 in, waist 26.8 in, hip 36.2 in | XS | XS | bust 33 in, waist 25 in, hip 36 in | US 0 |
| S | bust 35 in, waist 28.7 in, hip 38.2 in | S | S | bust 35 in, waist 27 in, hip 38 in | US 2/4 |
| M | bust 37 in, waist 30.7 in, hip 40.2 in | M | M | bust 37 in, waist 29 in, hip 40 in | US 6/8 |
| L | bust 40.2 in, waist 33.9 in, hip 43.3 in | L | L | bust 39.5 in, waist 31.5 in, hip 42.5 in | US 10 |
| XL | bust 44.1 in, waist 37.8 in, hip 47.2 in | 1X | XL | bust 45 in, waist 37.5 in, hip 47.5 in | US 14 |
| XXL | bust 48 in, waist 41.7 in, hip 51.2 in | 2X | not published | bust 48 in, waist 40.5 in, hip 50.5 in | US 16/18 |
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.
- Reformation size guide, read on 2026-09-18. Reformation on TrueToSize