SIZE CHART
| Narrow | Regular | Wide |
| usual size | usual size | size up |
| Size | Length | Width |
| 5 | 23.5 cm | 8 cm |
| 6 | 24 cm | 8 cm |
| 7 | 24.5 cm | 8.5 cm |
| 8 | 25.5 cm | 8.5 cm |
| 9 | 26 cm | 9 cm |
| Narrow | Regular | Wide |
| usual size | usual size | size up |
| Size | Length | Width |
| 5 | 23.5 cm | 8 cm |
| 6 | 24 cm | 8 cm |
| 7 | 24.5 cm | 8.5 cm |
| 8 | 25.5 cm | 8.5 cm |
| 9 | 26 cm | 9 cm |