Lululemon to Arc'teryx clothing size
The short answer
lululemon S is Arc'teryx XS by the two brands' own charts. 6 of 6 lululemon sizes land on a different label at Arc'teryx.
Both brands publish the body bust each size is cut for, so every row matches a bust, not a letter or a number.
| lululemon | lululemon builds it for | Arc'teryx, by chart | Same label | Arc'teryx builds it for | Arc'teryx also prints |
|---|---|---|---|---|---|
| XXXS | bust 28.5 in | not made | not published | not published | not published |
| XXS | bust 30 in | not made | not published | not published | not published |
| XS | bust 31 to 32 in | not made | XS | not published | not published |
| S | bust 33 to 34 in | XS | S | bust 33.1 in, waist 26.8 in, hip 36.2 in | not published |
| M | bust 35 to 36 in | S | M | bust 35 in, waist 28.7 in, hip 38.2 in | not published |
| L | bust 37 to 38.5 in | M | L | bust 37 in, waist 30.7 in, hip 40.2 in | not published |
| XL | bust 40 to 42 in | L | XL | bust 40.2 in, waist 33.9 in, hip 43.3 in | not published |
| 1X | bust 45 to 47 in | XL or XXL | not published | bust 44.1 in, waist 37.8 in, hip 47.2 in | not published |
| 2X | bust 49 to 51 in | XXL | not published | bust 48 in, waist 41.7 in, hip 51.2 in | 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
- lululemon size guide, read on 2026-09-18. lululemon on TrueToSize
- Arc'teryx size guide, read on 2026-09-18.