Thinking me not the socks..
The quality of the socks seems quite good. I tried on a pair and wore for a few hours. Then tried again the next morning and thought perhaps it was my legs (that they did not fit well, perhaps my legs had begun to swell). I waited and then tried a different pair of the socks on again.
I am thinking I must have ordered the wrong size? As I wear compression socks almost everyday . These other socks are medium but perhaps the Comrad socks are such good quality they are made 'tighter weave' than the other socks I have been wearing?
In fact I was coming to the computer and just inputting the Comrad return & exchange site from the instruction sheet.