S petite is oversized
I usually wear a s petite so that's what i initially got in this. i'm 5'2", 32c-27-36. the shoulders were about an inch too wide on either side, the sides along the top had tons of extra fabric (almost like batwings or a dolman cut) and the waist was at least 6" too big! i'm re-ordering in petite xs and hoping for the best, because this is a gorgeous coat.