Hybrid Boot size guide
| Hybrid boot Ruby | Ziggy thermo rainboot | Insole length (CM) | Insole length (Inch) | Height of shaft (CM) | Height of shaft (Inch) | EUR size | UK size | US size | |
| 14.3 | 5 5/8 | 11 | 4 1/3 | 22 | 6 | 6.5 | |||
| 15.1 | 6 | 11 | 4 1/3 | 23 | 7 | 7.5 | |||
| 15.8 | 6 1/4 | 11 | 4 1/3 | 24 | 8 | 8.5 | |||
| 16.5 | 6 1/2 | 11 | 4 1/3 | 25 | 8.5 | 9 | |||
| 17.1 | 6 3/4 | 11 | 4 1/3 | 26 | 9 | 9.5 | |||
| 17.8 | 7 | 11 | 4 1/3 | 27 | 10 | 10.5 | |||
| 18.5 | 7 3/8 | 11.5 | 4 1/2 | 28 | 11 | 11.5 | |||
| 19.1 | 7 1/2 | 11.5 | 4 1/2 | 29 | 11.5 | 12 | |||
| 19.7 | 7 3/4 | 12.5 | 5 | 30 | 12 | 12.5 | |||
| 20.4 | 8 | 12.5 | 5 | 31 | 13 | 13.5 | |||
| 21.2 | 8 3/8 | 12.5 | 5 | 32 | 13.5 | 1 | |||
| 21.7 | 8 5/8 | 12.5 | 5 | 33 | 1 | 1.5 | |||
| 22.5 | 8 7/8 | 12.5 | 5 | 34 | 2 | 2.5 | |||
| 23 | 9 | 12.5 | 5 | 35 | 2.5 | 3 |
