Brand new authentic faux double t-shirt...Boston Red Sox. 

 Size Small Adult, unisex, would probably also fit a Large Child.

Chest is 34" from armpit to armpit and back (UNstretched), length is 20" from neck to hem, and sleeve is 20" from shoulder seam to wrist.

Would make a nice gift for a fan - New With Tags, excellent condition from a smoke-free home.