They come up nice and high on me. I was a bit worried, since I'm a bit over 5'6, that they wouldn't be high enough, but they are! I definitely have to wear these with jeans or leggings though. I thought maybe it was nothing I could wear with just a dress, but it kind of makes it look like I have chicken legs. I'm 120-125lbs, so yes, on the slim side, my my thighs and calves are built. Maybe I need to play around more with them.  Oh, they are true to size! I ordered a size 10 and they fit like a glove!