I wear a UK 8-10 (usually 10) on bottom and these fit really comfortably with plenty of stretch. Like a glove without being tight or causing any bulging anywhere. Come up all the way to my bra strap pretty much. They fit like a pair of tights rather than leggings really, only more comfortable and flattering. Great under a dress/skirt. I haven't worn them yet, just tried them on. I am slightly concerned that they will rip the first time they get caught on something, so I don't see them lasting that long. They look great though. I have that pale, translucent skin that shows all of your veins - my legs are covered in purple thread veins top to bottom, which I feel very self-conscious about. I'm not a huge fan of tights, so something like this that's a bit more comfortable and stylish is perfect to cover up my legs in the summer for all those summer dresses. I would happily pick up a back up pair if they came into the sale.