Jream Brand Roll Pono BJJ Rash Guard XS

Very good quality BJJ rash guard. It fits like a true xs and is, therefore, too small for me. I wore it once in hopes that I could make it work because it's so pretty, but nope. There is a mark inside the back collar. It came from jream like that so not sure what it is. It is faintly noticeable from the outside.