XX Small = 32" = 34"
Extra Small = 34" - 36"
Small = 36" - 38"
Medium = 38" - 40"
Large = 40" - 42"
Extra Large = 42" - 44"
XX Large = 45" - 48"

XX Small = UK 6
Extra Small = UK 8
Small = UK 10
Medium = UK 12-14
Large = UK 16
Extra Large = UK 18
XX Large = UK 20