Here is a cool vintage button down long sleeve Western Snap shirt by Round Up. 65% poly, 35% cotton, and made in the USA. Handsome plaid of red, blues, and yellow. Seven button front, two on each cuff, and a buttoned pocket on each breast. It's light weight, fairly sheer, and soft. It's in amazing condition with tons of life left. The tag says Large, but here are the measurements. (Please refer to the last pic to see how I measure shirts)

Chest (armpit to armpit) 23"
Shoulder to end of sleeve (including cuff) 24"
Length 29"

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