Arc'teryx to Whistles clothing size
The short answer
Arc'teryx M is Whistles 14 or 12 by the two brands' own charts.
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 | Whistles, by chart | Same label | Whistles builds it for | Whistles also prints |
|---|---|---|---|---|---|
| XS | bust 33.1 in, waist 26.8 in, hip 36.2 in | 10 or 08 | not published | bust 34 in, waist 27.5 in, hip 38.5 in | not published |
| S | bust 35 in, waist 28.7 in, hip 38.2 in | 12 or 10 | not published | bust 36 in, waist 29.5 in, hip 40.5 in | not published |
| M | bust 37 in, waist 30.7 in, hip 40.2 in | 14 or 12 | not published | bust 38 in, waist 31.5 in, hip 42.5 in | not published |
| L | bust 40.2 in, waist 33.9 in, hip 43.3 in | 16 | not published | bust 40 in, waist 33.5 in, hip 44.5 in | not published |
| XL | bust 44.1 in, waist 37.8 in, hip 47.2 in | 20 or 18 | not published | bust 45 in, waist 38 in, hip 49 in | not published |
| XXL | bust 48 in, waist 41.7 in, hip 51.2 in | not made | not published | 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.
- Whistles size guide, read on 2026-09-18.