Superfeet Trim To Fit-GreenDesigned primarily for footwear with a removable insole, Superfeet Green provides maximum support and shock absorption. Featuring AgionŽ antimicrobial top cover treatment to help reduce bacteria and help prevent foot odor. Ideal for feet with medium to high arches. Recommended footwear: Running, walking, hiking, alpine and industrial footwear. Sizing: A= women's shoe 2.5 - 4. B= women's shoe 4.5 - 6. C= men's shoe 5.5 - 7, women's shoe 6.5 - 8. D= men's shoe 7.5 - 9, women's shoe 8.5 - 10. E= men's shoe 9.5 - 11, women's shoe 10.5 - 12. F= men's shoe 11.5 - 13, women's shoe 12.5+. G= men's shoe 13.5 - 15. H= men's shoe 15.5 - 17.