Tokaido keeps economy in mind; the fact is, it is usually the instep that has most ware and tear, you can now buy the Tokaido instep protectors separately.
-Specially designed shaped foam covered with resilient polyurethane and securely fastened by velcro straps. 
-Light weight and comfortable while providing excellent protection. 
 
Medium - 6 - 8 Men's US Shoe Size
Large - 8.5 - 10.5 Men's US Shoe Size
XL - 11 - 12.5 Men's US Shoe Size