This size chart includes measurements for men's flannels, short sleeve bamboo shirts, and short sleeve party shirts. Measurents are in inches

CHEST SHOULDER
XS 33-36 16
S 36-39 17
M 39-42 18
L 42-46 19
XL 46-49 20
2XL 49-52 21
3XL 52-55 22
4XL 55-58 24
5XL 58-61 25