Here is a cool vintage button down long sleeve shirt by Career Club. Most likely a poly and cotton blend, and made in the USA. Light blue background with geometric designs and brown floral accents. Seven button front, a button on each cuff, and a pocket on the left breast. Thin, light weight, soft, and super comfy. In great shape with tons of life left! Here are the measurements. (refer to the last pic above to see how I measure shirts)

Chest (armpit to armpit) 22"
Shoulder to end of sleeve (including cuff) 23"
Length 32"

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