I'm 5'7, my hips were 35 inches a few weeks ago and my waist was 25, and I wear a 0-6 depending on the brand/vanity sizing. H&M, which doesn't vanity size as much as others (I don't know how much they do) I'm a 6 but a 0-2 at express. I'm firmly a 0 at target. So a 10 today is huge.  And don't even get me started on dresses. That shit is all fucked up, but I'm still a 0 at places like express and a 4 at H&M.