Ok, I looked up board shorts on wikipedia. They're the kind of swimsuit my sons wearing. I'm worried I'd feel even more self-conscious in them. My sons are slim; they look good in things like that. I'm big; there'd be a lot more cloth on board shorts that would fit me. It's worth trying some on, though, to see how they look.

And I don't think a tank top would be a good idea. I have large, heavy breasts that need support. A bra under a shirt as Casey suggested is a possibility, but not a tank top, I don't think.