Jonap B5 SLIM Size Guide
| Size | Long | Broad |
| 25 | 16.1 | 6.5 |
| 26 | 16.8 | 6.7 |
| 27 | 17.5 | 6.9 |
| 28 | 18.1 | 7.1 |
| 29 | 18.8 | 7.2 |
| 30 | 19.6 | 7.4 |
*Inside shoe measurements
| Size | Long | Broad |
| 25 | 16.1 | 6.5 |
| 26 | 16.8 | 6.7 |
| 27 | 17.5 | 6.9 |
| 28 | 18.1 | 7.1 |
| 29 | 18.8 | 7.2 |
| 30 | 19.6 | 7.4 |
*Inside shoe measurements