Size Width Length
Small 21" 28.5"
Medium 23" 29.5"
Large 24.5" 30.5"
XL 26.5" 31.5"
2XL 27.5" 32.5"
3XL 28.5" 33.5
Width
Measured from 1" below the armpit.

Length
Measured from top of the shoulder.