Lululemon to Reformation clothing size
The short answer
lululemon S is Reformation XS by the two brands' own charts. 4 of 7 lululemon 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.
| lululemon | lululemon builds it for | Reformation, by chart | Same label | Reformation builds it for | Reformation 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 | XS | XS | bust 33 in, waist 25 in, hip 36 in | US 0 |
| S | bust 33 to 34 in | XS | S | bust 33 in, waist 25 in, hip 36 in | US 0 |
| M | bust 35 to 36 in | S | M | bust 35 in, waist 27 in, hip 38 in | US 2/4 |
| L | bust 37 to 38.5 in | M | L | bust 37 in, waist 29 in, hip 40 in | US 6/8 |
| XL | bust 40 to 42 in | XL | XL | bust 41.5 in, waist 33.5 in, hip 44.5 in | US 12 |
| 1X | bust 45 to 47 in | 1X | 1X | bust 45 in, waist 37.5 in, hip 47.5 in | US 14 |
| 2X | bust 49 to 51 in | 3X | 2X | bust 51 in, waist 43.5 in, hip 53.5 in | US 20 |
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
- Reformation size guide, read on 2026-09-18. Reformation on TrueToSize