Cadet One Snowboard Binding makes learning easy with kid-sized comfort and control Details Smallest snowboard binding Union has ever built, designed for kids learning to ride C1 Duraflex baseplate and highback deliver lightweight support and flex Single-strap system keeps entry and exit quick and easy Extruded 3D aluminum heelcup adds strength and durability Aluminum S2 ratchets with steel base ensure secure closure Soft 3/10 flex rating for forgiving performance and confidence building Universal V2 disk compatible with 4x4, 4x2, Channel, and 3D mounting systems Tech Highback: C1 Duraflex Baseplate: C1 Duraflex Ankle Strap: single strap system Ratchet: Aluminum S2 w/ Steel Flex: 3/10 Mount: 4 x 4, 4 x 2, Channel, 3D Pattern Activity: all-mountain snowboarding Manufacturer Warranty: 1 year Size Chart MEN SMALL MEDIUM LARGE MONDO 24 - 25.5 26 - 28 28.5+ UK 5 - 6.5 7 - 9 9.5+ US MEN 6 - 7.5 8 - 10 10.5+ EURO 38 - 40.5 41 - 43 43.5+ WOMEN SMALL MEDIUM LARGE MONDO 21 - 23.5 24 - 25.5 26 - 28 UK 2 - 4.5 5 - 6.5 7 - 9 US WOMEN 4 - 6.5 7 - 8.5 9 - 11 EURO 34 - 37 38 - 40.5 41 - 43 YOUTH EXTRA SMALL SMALL MEDIUM MONDO 17.5 - 21 21 - 23.5 24 - 25.5 UK 10K - 2 2 - 4.5 5 - 6.5 US YOUTH 11C - 3 3 - 5.5 6 - 7.5 EURO 28 - 34 34 - 37 38 - 40.5