Crab Grab 

Size Hand Circumference IN Hand Circumference CM
X-Small 6 - 6.5 15.25 - 16.5
Small 6.5 - 7.5 16.5 - 19
Medium 7.5 - 8.5 19 - 21.5
Large 8.5 - 9.5 21.5 - 24