Whistles to Diane von Furstenberg clothing size
The short answer
Whistles 12 is Diane von Furstenberg M by the two brands' own charts.
Both brands publish the body bust each size is cut for, so every row matches a bust, not a letter or a number.
| Whistles | Whistles builds it for | Diane von Furstenberg, by chart | Same label | Diane von Furstenberg builds it for | Diane von Furstenberg also prints |
|---|---|---|---|---|---|
| 04 | bust 30 in, waist 23.5 in, hip 34.5 in | not made | not published | not published | not published |
| 06 | bust 31 in, waist 24.5 in, hip 35.5 in | XXS | not published | bust 31 in, waist 24 in, hip 34 in | US 00 |
| 08 | bust 32 in, waist 25.5 in, hip 36.5 in | XS | not published | bust 32 in, waist 25 in, hip 35 in | US 0 |
| 10 | bust 34 in, waist 27.5 in, hip 38.5 in | S | not published | bust 33 to 34 in, waist 26 to 27 in, hip 36 to 37 in | US 2/4 |
| 12 | bust 36 in, waist 29.5 in, hip 40.5 in | M | not published | bust 35 to 36 in, waist 28 to 29 in, hip 38 to 39 in | US 6/8 |
| 14 | bust 38 in, waist 31.5 in, hip 42.5 in | L | not published | bust 37 to 38.5 in, waist 30 to 31.5 in, hip 40 to 41.5 in | US 10/12 |
| 16 | bust 40 in, waist 33.5 in, hip 44.5 in | XL | not published | bust 40 to 42 in, waist 33 to 35 in, hip 43 to 45 in | US 14/16 |
| 18 | bust 42.5 in, waist 35.5 in, hip 46.5 in | XL | not published | bust 40 to 42 in, waist 33 to 35 in, hip 43 to 45 in | US 14/16 |
| 20 | bust 45 in, waist 38 in, hip 49 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
- Whistles size guide, read on 2026-09-18.
- Diane von Furstenberg size guide, read on 2026-09-18.