Reformation to Diane von Furstenberg clothing size
The short answer
Reformation XS is Diane von Furstenberg S by the two brands' own charts. 4 of 5 Reformation sizes land on a different label at Diane von Furstenberg.
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 | Diane von Furstenberg, by chart | Same label | Diane von Furstenberg builds it for | Diane von Furstenberg also prints |
|---|---|---|---|---|---|
| XS | bust 33 in, waist 25 in, hip 36 in | S | XS | bust 33 to 34 in, waist 26 to 27 in, hip 36 to 37 in | US 2/4 |
| S | bust 35 in, waist 27 in, hip 38 in | M | S | bust 35 to 36 in, waist 28 to 29 in, hip 38 to 39 in | US 6/8 |
| M | bust 37 in, waist 29 in, hip 40 in | L | M | bust 37 to 38.5 in, waist 30 to 31.5 in, hip 40 to 41.5 in | US 10/12 |
| L | bust 39.5 in, waist 31.5 in, hip 42.5 in | XL or L | L | bust 40 to 42 in, waist 33 to 35 in, hip 43 to 45 in | US 14/16 |
| XL | bust 41.5 in, waist 33.5 in, hip 44.5 in | XL | XL | bust 40 to 42 in, waist 33 to 35 in, hip 43 to 45 in | US 14/16 |
| 1X | bust 45 in, waist 37.5 in, hip 47.5 in | not made | not published | not published | not published |
| 2X | bust 48 in, waist 40.5 in, hip 50.5 in | not made | not published | not published | 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
- Diane von Furstenberg size guide, read on 2026-09-18.