Here is a cool vintage short sleeve western snap shirt by Karman. It's 65% poly, 35% cotton, and made in the USA. Handsome striping of muted blues, greens, purplish gray, yellow, and tan. Seven button front, with a buttoned pocket on each breast. Soft, light weight, and super comfy. In excellent shape with lots of life left! The tag says medium, but here are the measurements. (refer to the last pic above to see how I measure shirts)

Chest (armpit to armpit) 20"

Shoulder to end of sleeve (including cuff) 9"

Length 33"

This item is sold from a vintage boutique in Roanoke, VA.