TO FIND THE BEST FIT, PLEASE MEASURE YOUR FOOT: 1. Measure your foot from the heel to the tip of the toe. 2. Look at the fourth explanatory picture and find the product that matches the size of your foot. NB: For more comfort use the carbon fiber foot plate insert under a softer shoe insole. CARBON INSERTS GIVE A BOOST TO YOUR ATHLETIC ACTIVITIES: During a push-off, carbon graphite shoe insoles want to maintain their shape, thereby providing you with some energy return through kinetic energy. Suitable for jogging, running, golf, workouts, volleyball, basketball, and other sports. ? STONG FOOT SUPPORT FOR HIKING ADVENTURES: These rigid carbon fiber shoe inserts are great for hiking - protect your feet from rocks and harsh terrain that can impact your soul while walking, trekking, or hiking. Carbon insole is also warm and corrosion-free, unlike steel insoles. MULTIPURPOSE ORTHOTIC INSOLES SUITABLE FOR SPORTS, HIKING, OR RECOVERY: The rigid shoe insert protects your feet, adds stability, and provides energy return during hikes and athletic activities. This shoe stiffener insert is also suitable for recovery if the trauma occurs on both feet - foot pain, arthritis, Turf Toe or Mortons Toe. NB: Consult your doctor to make sure this is the right orthotic support for you. A PAIR OF HIGH-QUALITY CARBON INSOLES: A Pair (2 pieces) of composite inserts for men and women. Carbon fiber shoe insoles are 1.2 mm thick flat plates with no arch support. The material properties make the inserts strong, durable, lightweight, thin, warm to the touch, and corrosion-free.Best Sellers Rank: See Top 100 in Health & Household. Item Form: Foam. Recommended Uses For Product: Shoe. Material: Carbon Fiber. Use for: Foot. Brand: ESTCARBON. : B09QSV23GQ. Manufacturer: Erismet LTD. Date First Available: January 17, 2022. Product Dimensions: 8.46 x 2.7 x 0.08 inches; 2.89 Ounces.