Sold as a PAIR of 2 INSOLES (one left and one right insole) - UNIVERSAL SIZE fits most adults; both men and women US shoe sizes 5+. At 4 inches long and 1.5 inches wide, they are not a full-sized insole. PERFECT FOR all-day use while standing, walking, running, etc. for peroneal tendon inflammation, genu valgum (knock knees) or varum (bow leggedness), arthritis, overpronation (inward roll foot), excess supination (outward roll of foot), and uneven foot alignment. One edge of each insert is raised , providing a 4-DEGREE MEDICAL LIFT for ankle inversion or eversion and treatment of flat feet, plantar fasciitis, Achilles tendonitis, stress fractures, shin splints, pinched nerves, heel spurs, heel pad syndrome, and heel bursitis. Posture correcting, ankle rolling guards are constructed of soft, adhesive silicone-like material that is COMFORTABLE against your skin AND EASY TO CLEAN with warm water and soap or use wet wipes to restore its sticky outside surface. Gel insoles have SELF-ADHESIVE BACKING so they will stay in place while allowing for repositioning inside your athletic tennis and dress shoes or boots for foot, ankle, knee, hip, and low back (sacroiliac joint) pain.