Size M fits like S - approximately 17 across chest and 62 long. My dress form is 4/6 for reference and it fits perfectly. In like new condition worn once. Absolutely no signs of wear. Gorgeous slate blue super stretchy silky fabric with attached art deco brooch in front. Slightly lighter than cover photo - photos 3&4 show accurate color. Fully lined, 1/2 side zipper. $300 originally This dress is sooo flattering on! Great Prom dress! Feel free to ask any questions. I ship same or next day. Smoke and pet free home.