What actually decides a compression sock
mmHg, and whether it is graduated. Graduated compression is tightest at the ankle and decreases up the leg, which is the mechanism that helps return blood upward. A sock with uniform pressure is a tight sock, not a compression sock. Every product on these pages states a graduated range; where a brand does not publish one, we do not list it.
Calf circumference, measured. Take a tape to the widest part of your calf, in the evening rather than first thing. Comrad publishes ranges per size (S 10-14 in, M 12-14 in, M Wide 14-16 in, L 15-17 in, L Wide 17-19 in, XL 18-20 in) and a 17-inch threshold for going wide. Use the chart on the page you are buying from - they differ slightly between styles.
Fiber, as an odor decision. A merino blend with bamboo rayon manages moisture and smell far better than nylon over twelve hours in a closed shoe. Nylon holds its compression well, costs less and launders easily. Published fiber breakdowns are patchy: Sockwell publishes one for the Elevation line, Comrad publishes nylon for its 20-30 line and nothing for its 15-20.
Toe seam and sole cushion. A seamless toe is the detail that prevents the pressure point most compression socks create over the toes. A light cushion under the sole makes a real difference when you are standing rather than running.
Replacement schedule. Compression degrades with washing. These are consumables on a rotation, not a one-off purchase, which is why multipacks make sense once you know a brand fits you - and why buying five pairs before you have worn one is a mistake.
The sizing failure mode worth knowing. Owner reports on the budget options consistently flag the same thing: the ankle and heel cuff rubbing painfully inside a shoe at women’s 9.5 wide and above. A painful sock is a sock you stop wearing, which is worse value than a more expensive one you keep on.