Millicent Print Long Sleeve Matte Jersey Wrap Minidress

I usually wear a size small (4 or 6 depending on the brand. For reference I’m 5’7” and 133lbs, curvy, bra size 34C). I bought this in a 6 but it was very small- snug in the arms and shoulders and although it wrapped the whole way around, I had to really try and stretch it to close it and not only was my cleavage way too out there, you could see my bra. I’m going to try sizing up and hope it fits/drapes better because it’s really a very pretty dress.