I usually wear a medium bottom but just like all the reviews say, get a size larger.  Ordering a large size hurt my pride a bit so I got them in a Medium.  Bad idea. They are tight and since they are low rise they go under my belly.  So on my fat days, they're not very flattering.  They're also a bit see through.  Perhaps it wouldn't have been this way if I got them a tad bigger.  I can't say these pants are super fantastic nonetheless.