|S||4 - 6.5||5 - 8||39 - Below|
|M||7 - 9.5||8.5 - 11||40 - 42|
|L||10 - 12.5||11.5 - 14||43 - 45|
|XL||13 - Up||14.5 - Up||46 - Up|
I bought these and wore them first day hiking in Yellowstone with a new pair of boots. They were smooth and provided "just right" support for the 10 mile hike. I also wore my Zensah calf sleeves on the plane for support and circulation during travel.
Give a little bit of compression around the ankles, and the seam free design allows for NO Blisters when you put them on the correct feet!
Great fit. Awesome support. Outstanding design.