Here is an awesome vintage T-shirt by USA T's. 50/50 poly and cotton blend, and made in the USA. Vivid green with St. Patty's day graphic on the front in white, with fuzzy iron on "Big O'Red" above it in red. This one is incredibly soft and comfy and in excellent condition with tons of life left. The tag says Large, but here are the measurements. (refer to the last pic above to see how I measure shirts)

Chest (armpit to armpit) 20"
Shoulder to end of sleeve (including cuff) 7"
Length 28"

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