Here is a handsome and sharp looking long sleeve Western Snap shirt by Knotts Sunbelt. It's 65% polyester, 35% cotton. Great plaid of blues, gray, white, red, orange, and green. Seven button front, three on each cuff, and a buttoned pocket on each breast. Light weight, soft, and comfy with years of life left! The tag says 15-33, but here are the measurements taken laying flat. (refer to the last pic above to see how I measure shirts)

Chest (armpit to armpit) 21"

Shoulder to end of sleeve (including cuff) 24"

Length 30"

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