Vintage Ginny the Green Machine T Shirt by Stedman
Here is a great vintage T-shirt from Sport T by Stedman. 50/50 poly and cotton blend, made in the USA. Green shirt with graphic on the front in white. Not sure what it means, but I'm hoping it applies to you. Fairly light weight, super soft, and comfy. It's in incredible condition with tons of life left. The tag says Medium, but here are the measurements taken laying flat (please refer to the last pic to see how I measure shirts)
Chest (armpit to armpit) 17"
Shoulder to end of sleeve (including cuff) 6"