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+