I was not prepared for winter in New England. I bought these to layer under my jeans which were too thin to keep me warm. I bought a pair for my daughter as well. We love how much warmer we are. These are seeing heavy use as we wear them under our jeans almost daily. They have held their shape well and fit nicely. They are one-size-fits-all and we are pretty short (5'3") but they are not too tall for us. I suspect they would stretch a bit more for a taller person because of how stretchy they are but I can't say for sure. I especially love how there is NO SEAM running up the front or the back from the crotch to the waist. I have two other thermal leggings with a seam running up the back and I can't wear them unless I tuck a shirt in because the seam irritates my skin after a couple of hours. These leggings are completely seamless except for the inseam running up the inside of each leg. LOVE it!