No. 6 Old School Clog on High Heel in Bourbon Size Guide
| No. 6 | 36 | 37 | 38 | 39 | 40 | 41 |
| US | 6/6.5 | 7 | 7.5/8 | 8.5/9 | 9.5/10 | 10.5/11 |
| EU | 36/36.5 | 37 | 37.5/38 | 38.5/39 | 39.5/40 | 40.5/41 |
| UK | 4/4.5 | 5 | 5.5/6 | 6.5/7 | 7.5/8 | 8.5/9 |
| AU | 6/6.5 | 7 | 7.5/8 | 8.5/9 | 9.5/10 | 10.5/11 |
| JP | 23/23.5 | 24 | 24/24.5 | 25/25.5 | 25.5/26 | 26.5 |