Ok so I’m a nurse, (female) I’ve measured my calf’s and the L is 17.25 and the right us 17.75. I’m 5’6 & wear a 8.5-9 shoe so I ordered the L/XL based on this, heard the problem I experienced, the docks were too long - came above my knee- if I tried to adjust them I had to fold the toes underneath my feet and the calf’s were too small. They were also THICK! I mean THICK like it should be 30 degrees if you’re gonna try to wear these. The material is a high quality and they are made well. Just not right for me.