Got these through amazon prime really fast! I ordered the Extra Large size and they are only slightly too big in the front, perfect on the sides I usually wear a 10.5 (wide) US size shoe.
Here is the size chart for men from the side of the box: XS:6-7, S:7.5-8.5, M:9-10, L:10.5-11.5, XL:12-13, XXL:14-15, XXXL:16-17
These socks are not scratchy at all they are soft and warm, but not warm enough to make my feet sweat. Great product! On a side note these socks are not for a fashionista. They are ugly but functional.