Here is a classic vintage long sleeve button down shirt by Excello. Feels like a poly blend, and made in the USA. Handsome and versatile tan color. Seven button front, a button on each wrist, a buttoned epaulet on each shoulder, and a buttoned pocket on the left breast. This shirt is fairly light weight, soft, and very comfy. It's in excellent shape with tons of life left. Here are the measurements. (refer to the last pic above to see how I measure shirts)

Shoulder to end of sleeve (including cuff) 21"
Chest (armpit to armpit) 25. 5"
Length 31"

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