Soft and comfortable to wear. 11" long x 0.2" think foam, cushioned insoles include eight, strategically placed, 800 gauss magnets per each insole (16 total). Magnets are imbedded (not protruding) and are bionorth (-) pole to stimulate acupoints in each foot. May be trimmed to fit any size foot. Great gift for anyone who spends a lot of time on their feet.