Bests & Worsts Reviews from Amazon

I wear a 40A bra. In other words, I have a large 40 inch girth, and a small breast, and don't have a lot of extra tissue either on top or on the sides. For some unknown reason, bra manufacturers can not put these things together. Yes, there are some people with expanded chests and small breast sizes - either AA or A. Why can't someone make a bra to fit? I've seen quite a few women ask this question besides me.