Here is an awesome long sleeve t-shirt by Gap. 100% cotton and made in the USA. Orange shirt with sleeves and stuff. Not much to explain about this one! Medium weight, but soft, comfy, and in amazing condition. The tag says XL, but here are the measurements. (refer to the last pic above to see how I measure shirts)

Chest (armpit to armpit) 24"
Shoulder to end of sleeve (including cuff) 25"
Length 31"

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