I bought 2 of these for a 24 year old couple. One is grey and one is pink. I was worried about the sizing because it is kind of hard to understand -but it worked out perfect. I ordered an xxl for my 6 foot 5 inch thin guy, and a medium for my 5 foot 5 inch thin girl. They are cute and comfy. Only problem so far is the little traction dots on the bottom of the foot are coming off. But they don't care they love them. The extreme softness and comfortable factor helps you to ignore that problem!