Elevate your expectations. Enjoy a new level of comfort for your footwear. Superfeet Comfort insoles use the finest materials to deliver unparalleled heel-to-toe cushion. Long-lasting support packed into a thinner, high-performance insole to help improve the fit of a wide range of footwear. Sizing: B (W: 4.5-6), C (M: 5.5-7)(W: 6.5-8), D (M: 7.5-9)(W: 8.5-10), E (M: 9.5-11)(W: 10.5-12), F (M: 11.5-13)