A compression sock only works when it fits. Too loose and it gives no support; too tight and it digs in. These steps help you choose well and keep your socks performing.
Measure, don't guess
Shoe size alone is not enough for knee-high compression. Measure in the morning, when swelling is lowest:
- Calf: the widest part of your calf, measured with a soft tape while seated with your foot flat.
- Ankle: the narrowest point just above the ankle bone.
- Shoe size: as a final check for the foot length.
Compare your calf measurement with the size chart on the product. If you fall between two sizes, the calf measurement should decide, and a wide-calf style is often more comfortable than sizing up.
Signs of a good fit
- Firm but comfortable at the ankle, easing off toward the knee.
- The top band sits about two fingers below the bend of the knee without rolling down.
- No pinching, numbness or deep marks after a few hours.
Materials
Most compression socks blend a soft base fiber with an elastic fiber that provides the stretch and recovery. Bamboo viscose and cotton blends feel soft and breathable; nylon and spandex blends are thinner and very durable. The elastic content is what keeps the compression consistent wear after wear.
Care that makes them last
- Wash after each wear – washing helps the fibers recover their shape.
- Machine wash cold on a gentle cycle, ideally inside a mesh laundry bag.
- Use a mild detergent. Skip bleach and fabric softener, which break down elastic fibers.
- Air dry flat, away from direct heat. Do not tumble dry or iron.
- Rotate two or three pairs so each one gets time to recover.
With regular wear, most compression socks keep their support for three to six months. When they slide down easily or feel loose at the ankle, it is time for a new pair.