US/UK Size CH Size Length Sleeve Chest Shoulder Width
S M 25.6" / 65 cm 23.2" / 59 cm 35.4" / 90 cm 16.1" / 41 cm
M L 26.0" / 66 cm 23.6" / 60 cm 37.0" / 94 cm 16.5" / 42 cm
L XL 26.4" / 67 cm 24.0" / 61 cm 38.6" / 98 cm 16.9" / 43 cm
XL 2XL 26.8" / 68 cm 24.4" / 62 cm 40.2" / 102 cm 17.3" / 44 cm
2XL 3XL 27.2" / 69 cm 24.8" / 63 cm 41.7" / 106 cm 17.7" / 45 cm

 

For the best fit, size down if you're between sizes.