Whistles to Reformation clothing size
The short answer
Whistles 14 is Reformation M or L 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 | Reformation, by chart | Same label | Reformation builds it for | Reformation 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 | not made | not published | not published | not published |
| 08 | bust 32 in, waist 25.5 in, hip 36.5 in | XS | not published | bust 33 in, waist 25 in, hip 36 in | US 0 |
| 10 | bust 34 in, waist 27.5 in, hip 38.5 in | XS or S | not published | bust 33 in, waist 25 in, hip 36 in | US 0 |
| 12 | bust 36 in, waist 29.5 in, hip 40.5 in | S or M | not published | bust 35 in, waist 27 in, hip 38 in | US 2/4 |
| 14 | bust 38 in, waist 31.5 in, hip 42.5 in | M or L | not published | bust 37 in, waist 29 in, hip 40 in | US 6/8 |
| 16 | bust 40 in, waist 33.5 in, hip 44.5 in | L | not published | bust 39.5 in, waist 31.5 in, hip 42.5 in | US 10 |
| 18 | bust 42.5 in, waist 35.5 in, hip 46.5 in | XL | not published | bust 41.5 in, waist 33.5 in, hip 44.5 in | US 12 |
| 20 | bust 45 in, waist 38 in, hip 49 in | 1X | 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
- Whistles size guide, read on 2026-09-18.
- Reformation size guide, read on 2026-09-18. Reformation on TrueToSize