Size S
Chest Pit To Pit 20"
Shoulder to Shoulder 16.5"
38"/40" Chest

Size M
Chest Pit To Pit 21"
Shoulder to Shoulder 17.25"
40"/42" Chest

Size L
Chest Pit To Pit 22"
Shoulder to Shoulder 18"
42"/44" Chest

Size XL
Chest Pit To Pit 23"
Shoulder to Shoulder 18.75"
44"/46" Chest

Size XXL
Chest Pit To Pit 24"
Shoulder to Shoulder 19.5"
46"/48" Chest

Size XXXL
Chest Pit To Pit 25"
48"/50" Chest