Shoe size in Korea is foot length in millimeters. Here's how to find your Korean shoe size: From US male size - add 22, divide by 3, and multiply by 25.4; From US female size - add 21, divide by 3, and multiply by 25.4; From inches - multiply your foot length by 25.4; From centimeters - multiply your foot length by 10; or; Use our shoe Unlock your perfect fit with our Foot Length to Shoe Size Conversion guide. Uncover the ideal size effortlessly. To be considered as a standard shoe, a size 8 will have a 3 9/16 inches wide. However, if you have a foot that is 3 9/16 inches wide but your foot measures 5 sizes, then definitely you will need a wider shoe for your size 5 shoe measurement. Pick shoe size to convert. Shoe sizes vary in length and width between sizing systems. Find the conversion charts for both. Different Sizing Systems. Shoe sizes vary across different regions and countries around the world. There are several sizing systems in use, each with its own standards and measurements. Mark the tip of the big toe and the outermost part of the heel, and use a ruler or measuring tape to measure the distance between the two points. This measurement represents the length of your feet. (For the most precise measurement, consider using a ruler with centimeters, rather than inches.) United States and Canada. United Kingdom. Europe. Australia. The shoe size converter is easy to use. Select the country or region you are converting from and then the one you are converting to. After that, let our calculator know whether you are working with men's, kids or women's shoes. Shoe Size Conversion. Use the shoe size converter charts below to convert your shoe size across any of the various shoe sizing systems used worldwide. Our shoe size conversion charts will help you convert across most sizes worldwide. rqOw.