Product Measurements (in) 

Size Length Sleeve Chest Waist
XS 27.36″ 23.62″ 40.94″ 38.58″
S 27.95″ 24.02″ 42.52″ 40.16″
M 28.54″ 24.41″ 44.09″ 41.73″
L 29.13″ 24.80″ 45.67″ 43.31″
XL 29.72″ 25.20″ 47.24″ 44.88″
2XL 30.31″ 25.59″ 48.82″ 46.46″

 

Between sizes? Size up.

Model is 5'8" (175 cm), 175 lbs, wearing size M.