Open back v-neck floor length ending dress

Open in the back, top part is floral lace and has small beads and sequins. Bottom is chiffon with slip underneath top layer of dress. Dress is floor length and has a built in bra. Runs a little small, I'm usually a size four and the six was about my size. I never wore it and it still has tags attached and original packaging, the reason of never wearing being that it was a little big in the chest (I'm a 34 B).