See pics for details of condition. I don't know that much about vintage tshirts but I'm happy to try to answer questions. Arms are single stitch: bottom hem is not.

Jerzees Size Extra Large, but I think it seems more like a large.

Approximate measurements laying flat

Pit to pit/chest - 22 in

Check out my other listings. Happy to bundle for additional discounts and combined shipping. Reach out if you have questions. Thank you!