I have experiented with this for many years. I am a slim 6'1" girl and feel comfortable with a size 38b more than anything else. I have tried going bigger but it just does not seem to fit my body size. I think that most of us think that bigger is better but I don't agree with that. How many women are walking around showing a bosom with d or bigger cup size? Not very many, so if you want to go out as I do, and do not want to draw attention to yourself then do not go overboard with breast size. Just try to strike a balance between your body size and what appears naturaly and you will blend in better.