I ordered this dress as a last minute Mardi Gras Ball gown. I couldn't believe such a beautiful dress was so affordable!! I received several compliments, and felt like a queen. I am 53, 125lbs, 34B and the medium worked perfectly for me (with a little assistance sliding it on lol). The corset back allows you a little wiggle room to adjust it as you needed.

My only complaint lies in the fact that THOSE SEQUINS HURT. My arms are red and irritated from rubbing the dress all night. I had seen another reviewer complain about this, and I decided to risk it anyways. Just really, beware.
Its not bad enough to prevent me from wearing the dress again, but just know you're arms will be a little raw the next day.