Nike to Reformation clothing size
The short answer
Nike S is Reformation XS or S by the two brands' own charts. 2 of 6 Nike 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.
| Nike | Nike builds it for | Reformation, by chart | Same label | Reformation builds it for | Reformation also prints |
|---|---|---|---|---|---|
| XXS | bust 27.5 to 29.5 in, waist 21.3 to 23.5 in, hip 30.5 to 33 in | not made | not published | not published | not published |
| XS | bust 29.5 to 32.5 in, waist 23.5 to 26 in, hip 33 to 35.5 in | XS | XS | bust 33 in, waist 25 in, hip 36 in | US 0 |
| S | bust 32.5 to 35.5 in, waist 26 to 29 in, hip 35.5 to 38.5 in | XS or S | S | bust 33 in, waist 25 in, hip 36 in | US 0 |
| M | bust 35.5 to 38 in, waist 29 to 31.5 in, hip 38.5 to 41 in | M | M | bust 37 in, waist 29 in, hip 40 in | US 6/8 |
| L | bust 38 to 41 in, waist 31.5 to 34.5 in, hip 41 to 44 in | L | L | bust 39.5 in, waist 31.5 in, hip 42.5 in | US 10 |
| XL | bust 41 to 44.5 in, waist 34.5 to 38.5 in, hip 44 to 47 in | XL or 1X | XL | bust 41.5 in, waist 33.5 in, hip 44.5 in | US 12 |
| XXL | bust 44.5 to 48.5 in, waist 38.5 to 42.5 in, hip 47 to 50 in | 1X or 2X | not published | bust 45 in, waist 37.5 in, hip 47.5 in | US 14 |
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
- Nike size guide, read on 2026-09-18. Nike on TrueToSize
- Reformation size guide, read on 2026-09-18. Reformation on TrueToSize