Reformation to Nike clothing size
The short answer
Reformation XS is Nike S by the two brands' own charts. 3 of 7 Reformation sizes land on a different label at Nike.
Both brands publish the body bust each size is cut for, so every row matches a bust, not a letter or a number.
| Reformation | Reformation builds it for | Nike, by chart | Same label | Nike builds it for | Nike also prints |
|---|---|---|---|---|---|
| XS | bust 33 in, waist 25 in, hip 36 in | S | XS | bust 32.5 to 35.5 in, waist 26 to 29 in, hip 35.5 to 38.5 in | not published |
| S | bust 35 in, waist 27 in, hip 38 in | S | S | bust 32.5 to 35.5 in, waist 26 to 29 in, hip 35.5 to 38.5 in | not published |
| M | bust 37 in, waist 29 in, hip 40 in | M | M | bust 35.5 to 38 in, waist 29 to 31.5 in, hip 38.5 to 41 in | not published |
| L | bust 39.5 in, waist 31.5 in, hip 42.5 in | L | L | bust 38 to 41 in, waist 31.5 to 34.5 in, hip 41 to 44 in | not published |
| XL | bust 41.5 in, waist 33.5 in, hip 44.5 in | XL | XL | bust 41 to 44.5 in, waist 34.5 to 38.5 in, hip 44 to 47 in | not published |
| 1X | bust 45 in, waist 37.5 in, hip 47.5 in | XXL | not published | bust 44.5 to 48.5 in, waist 38.5 to 42.5 in, hip 47 to 50 in | not published |
| 2X | bust 48 in, waist 40.5 in, hip 50.5 in | XXL | not published | bust 44.5 to 48.5 in, waist 38.5 to 42.5 in, hip 47 to 50 in | not published |
| 3X | bust 51 in, waist 43.5 in, hip 53.5 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
- Reformation size guide, read on 2026-09-18. Reformation on TrueToSize
- Nike size guide, read on 2026-09-18. Nike on TrueToSize