Union Bindings Size Chart
All boot to binding correlations are approximate due to variation between models and brands. Physically check that your boot fits your binding before you buy them and head to the mountain.
Men's
| Size | Small | Medium | Large |
| US Men's Boot | 6 - 7.5 | 8 - 10 | 10.5+ |
| Euro Boot | 38 - 40.5 | 41 - 43 | 43.5+ |
| UK Boot | 5 - 6.5 | 7 - 9 | 9.5+ |
| Mondo (CM) Boot | 24.0 - 25.5 | 26.0 - 28.0 | 27 - 30 |
Women's
| Size | Small | Medium | Large |
| US Men's Boot | 4 - 6.5 | 7 - 8.5 | 9 - 11 |
| Euro Boot | 34 - 37 | 38 - 40.5 | 41 - 43 |
| UK Boot | 2 - 4.5 | 5 - 6.5 | 7 - 9 |
| Mondo (CM) Boot | 21 - 23.5 | 24 - 25.5 | 26 - 28 |
Youth
| Size | X-Small | Small | Medium |
| US Youth Boot | 11C - 3 | 3 - 5.5 | 6 - 7.5 |
| Euro Boot | 28 - 34 | 34 - 37 | 38 - 40.5 |
| UK Boot | 10K - 2 | 2 - 4.5 | 5 - 6.5 |
| Mondo (CM) Boot | 17.5 - 21.0 | 21.0 - 23.5 | 24.0 - 25.5 |