Measure around your chest at the widest part, just under the arm pits, with your arms resting by your side.
|Small||88 - 96||35 - 37.5|
|Medium||96 - 103||37.5 - 40.5|
|Large||103 - 110||40.5 - 43|
|XL||110 - 119||43 - 47|
Please note: If you have big shoulders, we recommend going for a size up.