Roberto Cavalli dress

this dress is made from silk, has been worn once, and is in perfect condition! the dress goes to right below the knee (on me I'm 5'8) and is tight but it's breathable. the top fits me well I'm a (32C) but if any bigger it would probably be too tight. I usually wear size small or 2-4 if that helps since I don't know what US size it would convert to.