Marvel swimming suit cover up

This is a fit and flare bathing suit cover-up that is very short, and shows off your boobs. Its got a 1950s pin-up vibe with the sweet heart neck line and straps that criss-cross. It has been washed once but never worn out in public. It was a gift to me, but i like my cover ups to..cover up ;) you could wear it as a dress, but I would suggest shorts underneath if you plan on any bending. The item itself says M, but I think it fits like a S (tight medium).Thanks for looking!