Sexy Jump Apparel Cocktail/Party Dress super soft

Im sorry I cant get the pic rotate... Purchased at Macy's. I only wore it twice for prom and graduation night. I got many compliments on it, but got no chance to wear it! Still looks new with minimal sign of wear and really beautiful and soft material! Comes with a pair of cups as well. It doesn't say what size it is, but I'm pretty sure it's medium since it fits me as 120 lbs and 5 ft perfectly. Length is about 30 in. Bust is 12 in across and strap is 6 in. Original price is between $80-$85.