Very pleased with these liners. I bought the Large, and they are nice and roomy for my size 10.5 feet in my size 11 wellies. Wasn't sure that they would cuff over the tops of my boots, but they do. Kinda wish they would stay inside the boot when I slide my feet out, but the fact that they don't isn't really a big deal. Have washed them twice with minimal pilling. All in all, along with a nice thick wooly sock, they have kept my tootsies warm while I've been out seeing to the chickens etc during some bitter Colorado winter temperatures. My one complaint would be the $5.30 shipping fee - pretty sure a padded envelope would be completely adequate, and heck of a lot cheaper.