Emilio Pucci by Peter Dundas runway dress size US 6 NWT

Emilio Pucci x Peter Dundas black and blue runway dress, this has never been worn and in perfect condition, I have the straps for it, beautiful, gold, zipper detail, lace, and sequin detail, 100% silk, it has gum at the chest area to keep it up, fully lined and has stretch it is a US size 6, but it fits more like a 2/4. I will be adding the measurements. NWT