I am 5'5" 130lb 36C and purchased a medium thinking it would be the same as the Connie nightgown. But if you have your nightgown on it becomes tight (runs a bit small) I do love it but I decided to give it to my mother as a spring/summer robe. She loves it and I decided to re ordered the Rosalind style robe because of the detail to match my nightgown in a Large this time. All the 1 for U line is beautiful, I want it all.