I don't think it's a good idea to use guys as the judgment tool for a bathing suit. What the hell do we know about a girls bathing suit? I would suggest that you find an adult with good taste and go to the department store and start trying them on. You have to be honest with what you see in the mirror. If your belly isn't flat, your butt over sized and your boobs huge then I would say you might get away with a two piece. You just have to be honest with yourself. I think a big girl in a bikini just looks more naked than a skinny girl.