Just get em online, google venous compression stockings. Don’t get anything over 30mmHg. I like Jobst, Juzo, Sigvaris and Medi. The Medi brand is nice because they come in lots of colors and are more sheer like normal socks instead of the heavy brown look of the Jobst. Make sure to get close toe (vs. open) or they will slide up your foot a bit when running). You should be able to find some measurement guidelines to assist in sizing (i.e. calf at its widest part, caft 10 inches up from the ground, shoe size, etc.)