Improves circulation to help minimize swelling. Relieves tired, achy legs. Designed with graduated compression. Compression decreases gradually up the leg with maximum compression at the ankle to help promote healthy legs. Helps relieve symptoms of mild varicose veins. Stylish, silky-soft material has a reinforced toe & heel enhanced with run guard for durability. Comfort top band won't bind and keeps knee highs from rolling down. Compression level: Mild (8-15 MMHG). Large fits us shoe size 8 - 10-1/2. 14" from floor to bend in knee: 16" calf measurement 15" from floor to bend in knee: 16" calf measurement 16" from floor to bend in knee: 15"-16" calf measurement 17" from floor to bend in knee: 15"-16" calf measurement 18" from floor to bend in knee: 14"-15" calf measurement 19" from floor.