The Vendor messed up and accidently sent me the wrong size run but they were out in the plus sizes and it was so cute I just couldn't send them back.
Fit Advise: I found the M/L ran big. I typically wear a 1X, especially in a vest but it went on me and I could layer a medium weight something under it. The S/M is quite a bit smaller. I'd say that one fits closer to true to size.
S/M; Bust 40, Waist 38, Hips 44, Length 24
M/L: Bust 48, Waist 46, Hips 50, Length 26