Highway 21 Footwear Size Chart
Sizing information does not guarantee a perfect fit. Please use this chart as a guide only.
| Size | US Men | US Women | EU | UK | Inches |
| 6 | 6 | 7 | 39 | 5.5 | 9.3125" |
| 7 | 7 | 8 | 40 | 6.5 | 9.625" |
| 8 | 8 | 9 | 41 | 7.5 | 9.9375" |
| 9 | 9 | 10 | 42 | 8.5 | 10.25" |
| 10 | 10 | 11 | 43 | 9.5 | 10.5625" |
| 11 | 11 | 12 | 44 | 10.5 | 10.9375" |
| 12 | 12 | 13 | 45 | 11.5 | 11.25" |
| 13 | 13 | 14 | 46 | 12.5 | 11.5625" |
| 14 | 14 | 15 | 47 | 13.5 | 11.875" |