Discreet Cold Shoulder 3/4 Sleeved Black shirt with Zipper detail

Label does not specify a size. Size label may have been previously torn off. I would estimate a Medium, but I did provide photos with measuring tape to show sizing. It is slightly stretchy, and yes the zipper opens allllll the way down. Let me know if you need any other measurements! Comes from a smoke free home. I do have dogs, so be aware if you have allergies. Item has been washed and stored in a room the dogs do not have access to.