I have  small calves - 13". These are slightly loose but a perfect over pants and thick socks. As soon as I put them on (even with short socks) I can feel the warmth. I have not tested them in the snow yet, but did take a long walk in the cold rain. They are extremely light - I thought the box was empty. This makes them perfect for traveling. The zipper is slightly hard to get up but I just hold the top sides together for easier zipping - I don't think this is a huge problem. They do feel slightly short but not enough for me to size up. Since I have a narrow foot I will put an insert in them  since on the walk I could feel my foot moving.
I could see some glue at the toe - I assume this is the waterproofing/sealing but I had to look for it. Overall - if you find them on sale they are worth it. I would buy another color if I find them for a good price again or wait for next years version.