Lululemon to Athleta clothing size
The short answer
lululemon XS is Athleta XXS by the two brands' own charts. 5 of 7 lululemon sizes land on a different label at Athleta.
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 | Athleta, by chart | Same label | Athleta builds it for | Athleta also prints |
|---|---|---|---|---|---|
| XXXS | bust 28.5 in | not made | not published | not published | not published |
| XXS | bust 30 in | not made | XXS | not published | not published |
| XS | bust 31 to 32 in | XXS | XS | bust 31.5 in, waist 24.3 in, hip 34 in | US 00 |
| S | bust 33 to 34 in | XS | S | bust 32.5 to 33.5 in, waist 25.3 to 26.3 in, hip 35 to 36 in | US 0-2 |
| M | bust 35 to 36 in | S | M | bust 34.5 to 35.5 in, waist 27.3 to 28.3 in, hip 37 to 38 in | US 4-6 |
| L | bust 37 to 38.5 in | M | L | bust 36.5 to 37.5 in, waist 29.3 to 30.3 in, hip 39 to 40 in | US 8-10 |
| XL | bust 40 to 42 in | L or XL | XL | bust 39 to 40.5 in, waist 31.8 to 33.3 in, hip 41.5 to 43 in | US 12-14 |
| 1X | bust 45 to 47 in | 1X | 1X | bust 44.3 to 46.3 in, waist 38 to 40 in, hip 47.3 to 49.3 in | US 16W-18W |
| 2X | bust 49 to 51 in | 2X | 2X | bust 48.3 to 50.8 in, waist 42 to 44.5 in, hip 51.3 to 53.8 in | US 20W-22W |
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
- Athleta size guide, read on 2026-09-18. Athleta on TrueToSize