Size down!
This has a heftier fabric than seems to be in the picture online. i wish it were the same fabric as the fringed chambray dress. that, coupled with it being cut very generously, and the hip placement of the bulky pocket fabric, causes it to look quite thick and dumpy unless you pin your elbows in to show where your waist is.  i usually wear a 4-6, and bought the 2. i'm returning it for a 0 petite and see how that goes.  i love it, so i'm hoping that causes the fit to appear more as it does on the