Easy, I went to Victoria secret and got fitted. Since they did not have a 40C bra in the style I wanted she gave me a 38D and it fits wonderfully. I am blessed with natural "boobs" and have done all I can to get them more feminine and it has worked. My wife tells me I have better boobs than most woman, oh I just love the compliments. My favorite bras are VS biofit,non padded, just the best fit and comfort. I got my wife wearing them as well, she says they are the best bra's as well.