Size Chart
  S 6 3/4 - 6 7/8 21 1/2 - 21 5/8"
  M 7 - 7 1/8 22 - 22 3/8"
  L 7 1/4 - 7 3/8 22 3/4 - 23 1/8"
  XL 7 1/2 - 7 5/8 23 1/2 - 24"

Size chart is a general guide. It may include sizes that are unavailable for this item.