Whistles to Nike clothing size
The short answer
Whistles 12 is Nike 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 | Nike, by chart | Same label | Nike builds it for | Nike also prints |
|---|---|---|---|---|---|
| 04 | bust 30 in, waist 23.5 in, hip 34.5 in | XS | not published | bust 29.5 to 32.5 in, waist 23.5 to 26 in, hip 33 to 35.5 in | not published |
| 06 | bust 31 in, waist 24.5 in, hip 35.5 in | XS | not published | bust 29.5 to 32.5 in, waist 23.5 to 26 in, hip 33 to 35.5 in | not published |
| 08 | bust 32 in, waist 25.5 in, hip 36.5 in | XS | not published | bust 29.5 to 32.5 in, waist 23.5 to 26 in, hip 33 to 35.5 in | not published |
| 10 | bust 34 in, waist 27.5 in, hip 38.5 in | S | not published | bust 32.5 to 35.5 in, waist 26 to 29 in, hip 35.5 to 38.5 in | not published |
| 12 | bust 36 in, waist 29.5 in, hip 40.5 in | M | not published | bust 35.5 to 38 in, waist 29 to 31.5 in, hip 38.5 to 41 in | not published |
| 14 | bust 38 in, waist 31.5 in, hip 42.5 in | M | not published | bust 35.5 to 38 in, waist 29 to 31.5 in, hip 38.5 to 41 in | not published |
| 16 | bust 40 in, waist 33.5 in, hip 44.5 in | L | not published | bust 38 to 41 in, waist 31.5 to 34.5 in, hip 41 to 44 in | not published |
| 18 | bust 42.5 in, waist 35.5 in, hip 46.5 in | XL | not published | bust 41 to 44.5 in, waist 34.5 to 38.5 in, hip 44 to 47 in | not published |
| 20 | bust 45 in, waist 38 in, hip 49 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 |
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.
- Nike size guide, read on 2026-09-18. Nike on TrueToSize