Chest Neck Arm
SMALL 38″ – 39″ 15″ – 15.5″ 32″ – 33″
MEDIUM 40″ – 41″ 15.5″ – 16″ 33″ – 34″
LARGE 42″ – 43″ 16″ – 16.5″ 34″ – 35″
X-LARGE 44″ – 45″ 16.5″ – 17″ 35″ – 36″

 

If between sizes, we suggest you size down.