Whistles to Reiss clothing size
The short answer
Whistles 06 is Reiss 4 by the two brands' own charts. 6 of 7 Whistles sizes land on a different label at Reiss.
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 | Reiss, by chart | Same label | Reiss builds it for | Reiss also prints |
|---|---|---|---|---|---|
| 04 | bust 30 in, waist 23.5 in, hip 34.5 in | not made | 4 | not published | not published |
| 06 | bust 31 in, waist 24.5 in, hip 35.5 in | 4 | 6 | bust 31 in, waist 24 in, hip 34 in | US 0 · Letter XS · FR 34 · IT 36 · AU 4 · EU (as printed) 32 |
| 08 | bust 32 in, waist 25.5 in, hip 36.5 in | 6 | 8 | bust 32 in, waist 25 in, hip 35 in | US 2 · Letter XS · FR 36 · IT 38 · AU 6 · EU (as printed) 34 |
| 10 | bust 34 in, waist 27.5 in, hip 38.5 in | 8 or 10 | 10 | bust 33 in, waist 26 in, hip 36 in | US 4 · Letter S · FR 38 · IT 40 · AU 8 · EU (as printed) 36 |
| 12 | bust 36 in, waist 29.5 in, hip 40.5 in | 10 or 12 | 12 | bust 35 in, waist 28 in, hip 38 in | US 6 · Letter S · FR 40 · IT 42 · AU 10 · EU (as printed) 38 |
| 14 | bust 38 in, waist 31.5 in, hip 42.5 in | 12 or 14 | 14 | bust 37 in, waist 30 in, hip 40 in | US 8 · Letter M · FR 42 · IT 44 · AU 12 · EU (as printed) 40 |
| 16 | bust 40 in, waist 33.5 in, hip 44.5 in | 14 or 16 | 16 | bust 39 in, waist 31.5 in, hip 42 in | US 10 · Letter M · FR 44 · IT 46 · AU 14 · EU (as printed) 42 |
| 18 | bust 42.5 in, waist 35.5 in, hip 46.5 in | 18 | 18 | bust 43 in, waist 36 in, hip 46.5 in | US 14 · Letter L · FR 48 · IT 50 · AU 18 · EU (as printed) 46 |
| 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.
- Reiss size guide, read on 2026-09-18.