I'm 5'4" (and a half) (hey, that half is important) and 115 lbs. I ordered a size 3. They fit great, so no sizing issues here. It's just that the pants ended up being...meh. They kinda made my butt look flat. Now you're thinking "Well you skinny bit*#, your butt probably IS flat." But I swear my arse usually looks cute and round in jeans. They also have no stretch or flex to them, which makes them fit a little awkwardly. Nothing you can see, it just impacts the way they feel. It's hard to explain. At any rate, I've decided to send them back and try for a different brand. I think these pants might have great potential for someone with more curves.