Plain white cotton muscle shirt in size M

I think this is a unisex top because it fits way bigger than a medium. But you can wear a tank top under as well if the armholes are too big. It’s never been worn. New without tags. Just tried on and it’s too big on me. But it’s nice for summer. 100% cotton. Pit to pit 21.5” can stretch to 23.5” Armhole 8” Length 27”