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| Inches | 9.31 | 9.5 | 9.69 | 9.81 | 10 | 10.19 | 10.31 | 10.5 | 10.69 | 10.81 | 11 | 11.19 | 11.31 | 11.5 | 11.69 | 11.81 | 12 | 12.19 | 12.31 |
| Size | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 13.5 | 14 | 14.5 | 15 |
( ^ US / Canada sizes)
| US / Canada | China | Australia | Europe | Mexico | Japan | UK |
| 5 | 38 | 4.5 | 37.5 | - | - | 4.5 |
| 5.5 | 39 | 5 | 38 | - | - | 5 |
| 6 | 39.5 | 5.5 | 38.5 | 25 | 24 | 5.5 |
| 6.5 | 40 | 6 | 39 | - | 24.5 | 6 |
| 7 | 41 | 6.5 | 40 | 26 | 25 | 6.5 |
| 7.5 | - | 7 | 40.5 | - | 25.5 | 7 |
| 8 | 42 | 7.5 | 41 | 27 | - | 7.5 |
| 8.5 | 43 | 8 | 42 | - | 26 | 8 |
| 9 | 43.5 | 8.5 | 42.5 | 28 | 26.5 | 8.5 |
| 9.5 | 44 | 9 | 43 | - | 27 | 9 |
| 10 | 44.5 | 9.5 | 44 | 29 | 27.5 | 9.5 |
| 10.5 | 45 | 10 | 44.5 | - | 28 | 10 |
| 11 | 46 | - | 45 | 30 | 29 | 10.5 |
| 11.5 | - | 11 | 45.5 | - | 29.5 | - |
| 12 | 47 | - | 46 | 31 | 30 | - |
| 13 | 48.5 | 12 | 47.5 | 32 | 31 | - |
| Inches | 8.69 | 8.81 | 9 | 9.19 | 9.31 | 9.5 | 9.69 | 9.81 | 10 | 10.19 | 10.31 | 10.5 |
| Size | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 |
( ^ US / Canada sizes)
| US / Canada | China | Australia | Europe | Mexico | Japan | UK |
| 5 | 35.5 | 3.5 | 35 | - | 21 | 2.5 |
| 5.5 | 36 | 4 | 35.5 | - | 21.5 | 3 |
| 6 | 37 | 4.5 | 36 | - | 22 | 3.5 |
| 6.5 | 37.5 | 5 | 37 | - | 22.5 | 4 |
| 7 | 38 | 5.5 | 37.5 | - | 23 | 4.5 |
| 7.5 | 39 | 6 | 38 | 4.5 | 23.5 | 5 |
| 8 | 39.5 | 6.5 | 38.5 | 5 | 24 | 5.5 |
| 8.5 | 40 | 7 | 39 | 5.5 | 24.5 | 6 |
| 9 | 41 | 7.5 | 40 | 6 | 25 | 6.5 |
| 9.5 | - | 8 | 41 | 6.5 | 25.5 | 7 |
| 10 | 42 | 8.5 | 42 | 7 | 26 | 7.5 |
Measure between the highest point of your toes to the lowest part of your heel.
Measuring in inches would be best for the sake of the tables above, but if you only have a measuring tape or ruler with centimetres, that's ok - use the converter!

Alpinestars boots run 1/4 to 1/2 size larger than standard street shoes.
TCX boots run 1/4 to 1/2 size smaller than standard street shoes.
Sidi boots run 1/4 size smaller than standard street shoes.
Fly boots run 1 full size smaller than standard street shoes.