I bought a set of these a few years ago and you can see my review below. I'm still getting fantastic use out of them. I wear them under winter clothing and also as long-johns when camping as you can walk about in them without feeling under-dressed. I have ordered a new pair because I'm finding them so useful and need to be able to put one pair in the wash. They wash beautifully by the way. The new pair are just like the originals so I am a 'happy bunny'. I am around size 16 or slightly below and bought the large which works well.