Open back prom dress

Worn for my senior prom, size 4. Fits a 34B-34C bust and the waist has room in it. I wear a size 6-9 pants and it was a little loose on the lower half. It's almost a two piece but it's connected a little in the front. I love this gown so much! It has jewels that sparkle in the light. Definitely my favorite dress and I didn't see any like it at my prom :) I am 5'5 and had 3-4 extra inches for heels!