Jeering 7V BATTERY HEATED VEST LINER SIZE CHART UNISEX SIZE CHART A-SLEEVE LENGTH: BEND ARM SLIGHTLY & MEASURE ALONG OUTSIDE CF ARM, FROM CENTER BACK OF NECK, TO TIP OF SHOULDER, DOWN T0 WRIST. B-CHEST: MEASURE AROUSE FULLEST PART OF CHEST, KEEPING THE TAPE LEVEL UNDER ARMS & ACROSS BACK.