I followed the instructions of others and did the one cup down and one band size up and it didn't work for me. The band size is right but I still need the same cup size. It is doable but I am hoping that the other strapless bra that I bought will work for my wedding.
I absolutley loved this bustier, however, it was huge! I normally wear a 34B or 32C. I ordered this in the 34B and it was very loose on me. Although I have never been an A cup, I was ready to exchange it for one. However, the smallest size they make is the B cup. Such a shame. The fit seemed like it would have been great to wear under my wedding dress. I would definitely recommend this, but buy a size smaller than you would normally wear.