When ordering shoes online, especially from other countries, it is necessary to determine your shoe size not only in the standard U.S. size chart, but also in inches or centimeters. This is accomplished by measuring both feet and then comparing your answer to a size chart depending on your gender. You can then use these answers when shopping for shoes.

To convert the length of your foot in inches to the U.S. shoe size, the first step is to measure the foot. To do this, outline your foot on a sheet of paper using a pen or a pencil. After you've outlined the foot, use a ruler to draw a box around the foot, with each side of the box touching one side of the foot. This will give you straight points for measurement. After the box has been drawn, use your ruler to measure lengthwise, from one end of the box to the other. Write the number down and round to the hundredths place such, as 10.75 inches. Next measure your other foot using the same method. If both feet are not the same size, you'll need to use the larger of the two measurements. After you've measured the length of both feet and determined the larger of the two, you'll need to compare your answer to the shoe size charts below. Shoe sizes do not go up in set increments, which makes a formula for determining shoe size difficult to achieve. If your measurement is between two shoe sizes, go with the larger size; otherwise, you my find the shoe is too small for your foot.

Size 6 = 9.31 inches Size 6.5 = 9.5 inches Size 7 = 9.69 inches Size 7.5 = 9.81 inches Size 8 = 10 inches Size 8.5 = 10.19 inches Size 9 = 10.31 inches Size 9.5 = 10.5 inches Size 10 = 10.69 inches Size 10.5 = 10.81 inches Size 11 = 11 inches Size 11.5 = 11.19 inches Size 12 = 11.31 inches Size 12.5 = 11.5 inches Size 13 = 11.69 inches Size 13.5 = 11.81 inches Size 14 = 12 inches Size 14.5 = 12.19 inches Size 15 = 12.31 inches

Size 5 = 8.68 inches Size 5.5 = 8.81 inches Size 6 = 9 inches Size 6.5 = 9.18 inches Size 7 = 9.31 inches Size 7.5 = 9.5 inches Size 8 = 9.68 inches Size 8.5 = 9.81 inches Size 9 = 10 inches Size 9.5 = 10.18 inches Size 10 = 10.31 inches Size 10.5 = 10.5 inches Size 11 = 10.68 inches Size 11.5 = 10.81 inches Size 12 = 11 inches

If you haven't measured your foot and are needing to determine how long your foot is in inches, then you can reverse the conversion by knowing your shoe size and determining the average length of the foot based on the U.S. shoe size chart. Additionally, to convert to centimeters, multiply your measurement in inches by 2.54. The resulting answer is your length in centimeters.