Body Assist Tulis Heavy Duty Heel Cups provide maximum performance and protection to the achilles tendon, with twice the thickness of the Classic Cups. These cups provide ultimate heel pain relief by cushioning the area of pain and eleviating the heel bone. 2 sizes available: Regular & Large. Please see images for measurements. The benefits of these cups are:. Fits sports shoes, works boots and more spacious lace-up shoes. Plantar Fasciitis treatment, prevention of achilles tendonitis and Sever's disease, sports and running. Helps relieve shin splints and works well for people who need to stand all day. How To Use Sizing: US shoe sizing. Regular - Men's shoe sizes 7 and under. Women's shoe sizes 9 and under. (Weight under 175 lbs.). Large - Men's shoe sizes 8 and up. Women's shoe sizes 10 and up. (Weight over 175 lbs.).