Lake Women's LX140 Cycling Shoe 100% Fabric Rubber sole Shaft measures approximately 4 1/2" from arch Heel measures approximately 1" Platform measures approximately 1/2" Boot opening measures approximately 8" around Please use the vendor recommended size on the box. Please be aware that there may be some inconsistencies in the US sizing conversion indicated in the shoe tongue label. Waterproof, windproof and breathable