Strap:
10mm thick with strap

Small:
    Dimensions: 9.8" x 3.75".
    Size: Mens 7-8, Ladies 6-8

Medium:
    Dimensions: 10.5" x 4.25".
    Size: Mens 8-10, Ladies 9-10

Large:
    Dimensions: 11.5" X 4.375”.
    Size: Men 10-12, Ladies 11