NW Chelsea Womens
(measurements are in CM)
| UK Size | Insole Length | Max Calf Circumference | Boot Height |
| UK3 | 232.54 | 250.00 | 120.00 |
| UK4 | 241.00 | 257.00 | 120.00 |
| UK5 | 249.46 | 264.00 | 130.00 |
| UK6 | 257.92 | 271.00 | 130.00 |
| UK7 | 266.38 | 278.00 | 140.00 |
| UK8 | 275.84 | 285.00 | 140.00 |
| UK9 | 283.30 | 292.00 | 145.00 |
Universal Size
| EU Size | US Size | UK Size | JP Size | Insole | Mac Calf Area | Leg Height |
| 36 | 5 | 3 | 22 | 23.2 | 36.5 | 37.5 |
| 37 | 6 | 4 | 23 | 24.3 | 36.3 | 37.5 |
| 38 | 7 | 5 | 24 | 25.2 | 37.8 | 37.5 |
| 39 | 8 | 6 | 25 | 25.5 | 38.6 | 40.5 |
| 40/41 | 9 | 7 | 26 | 26.8 | 39.4 | 40.5 |
| 42 | 10 | 8 | 27 | 27.5 | 40.2 | 40.5 |
| 43 | 11 | 9 | 28 | 28.5 | 41 | 40.5 |