SIZE : MED 21.5 " ARMPIT TO ARMPIT AND 28 " FROM SHOULDER TO BOTTOM SIZE: LARGE 22 " ARMPIT TO ARMPIT AND 28.5" SHOULDER TO BOTTOM SIZE : XLARGE 23.5 " ARMPIT TO ARMPIT AND 30 " FROM SHOULDER TO BOTTOM SIZE : 2XL 25 " ARMPIT TO ARMPIT AND 31 " FROM SHOULDER TO BOTTOM