This dress isn't on sale but it is under $75, so I'll take it. It's a really nice summer weight, would be nice for vacation / beach, as well because it's pretty versatile for summer. This is the medium. It is tight at the back / bust for me (it's a crossover in the back) so I think for my boobs and underarms sake, I would go with a large. As you can see, it's not too tight in the boobs, just the shoulders / back area.