I am on slim for life and its been two in a half weeks and I have lost 12 pounds so far. I got a dress from Davids bridal and it has a corset back. The dress was a tid bit tight when I got it and I gained a little bit of weight after I bought it. But I plan to lose at least 30 to 40 pounds. I am exactly and currently weigh 160. I have always been big boned with wide hips though so I have always been a lil thick. I love my dress and want to wear on my wedding day. I believe it is a size 12. It might be a 14 though. About how many sizes can a corset back be brought in??