How do you "really" determine the size?...
How do you "really" determine the size? The size chart references calf circumference, but these are ankle socks. What size should I get if my regular shoe size is 10.5?
According CEP you need to measure the widest part of your ankle to get the correct size sock. Check their website at http://www.cepcompression.com/dynamic-short-socks.html