Here is an awesome vintage T-shirt by Tee Swing. 50/50 poly and cotton blend, and made in the USA. Dark blue shirt with Seal Team logo on the left breast. Soft, comfy, and in mint condition with tons of life left. The tag says Large (42-44), but 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) 8"
Length 29"

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