Relaxed fit
Recommended sizing up if in between sizes

Size (US) Chest (in.) Length (in.)
S 39 1/2 28 1/4
M 42 1/2 29 1/4
L 45 1/2 30 1/2
XL 48 1/2 31 3/4
2XL 53 1/2 32 3/4