I bought size 11 but I may order 1 sz larger for a more comfortable fit. My measurements - waist 30, hip 44.  The fit is snug and a bit uncomfortable when i sit, but they look good on. They are low rise, and lower in the back than they fit the model if you have a big butt. They seem to be cut to suit a curvy shape, but other than that I don't see any "shaping" effect.  Capris by this same company but in a softer fabric fit me perfectly in the size 11, but the denim fabric is heavier and not as stretchy.