Sizing Chart - Gamma Series

For Chest :  Measure 1 inch below armpits.

Measure	Chest (inch)	Shoulders (inch)
M	38-39	16.5
L	40-41.5	17.5
XL	43-44	18.5
XXL	45-46	19.5

 

For Shoulder width : Measure distance from left shoulder to right shoulder. Specifically, where the shoulder curves to arm. Shoulders to be in relaxed position.