Here is an awesome short sleeve vee neck t-shirt by Gap. 100% cotton, and made in the USA. Gray shirt with tasteful Vee neckline. Medium weight. Super soft and comfy, and in incredible shape with tons of life left. The tag says Small, 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) 7"
Length 26"

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