Here is a super cool short sleeve polo shirt Munsingwear. 50/50 poly and cotton blend, made in the USA. Handsome blue/white fabric with white stripes at the collar. Two button front, pocket on the left breast featuring the iconic penguin in white. Light pilling at the collar. Otherwise, this one is in excellent condition with tons of life left! The tag says Extra Large, but here are the measurements. (refer to the last pic above to see how I measure shirts)

Chest (armpit to armpit) 25"
Shoulder to end of sleeve (including cuff) 11"
Length 29"

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