Georgeous Black and Nude gown! Prom?

Black lace gown with nude color lining. Back zip, sleeveless, w/ full bottom and 2nd layer slip attached. Black ribbon and small front bow finish it off. Can not find a size on this. But I have looked at a standard USA dress chart and it looks to be about a sz 5/6. The bust is 18 " from pit to pit. The waist is 14" from side to side and the hips are 19" from side to side.