Measurements are taken from the shirt laid down flat. Shirts may vary +/- 0.25" 

SIZE	CHEST	SLEEVE	LENGTH	SHOULDER
S	41	25	27.25	17.5
M	43.5	26	28.5	18.25
L	45.5	26.5	29	19
XL	47.5	27	30.25	19.5

If you have any questions, don't hesitate to reach out - support@westmajor.com