How are feet measured in the US?
Foot length is measured with the subject standing barefoot and the weight of the body equally distributed between both feet. The sizes of the left and right feet are often slightly different. A shoe-size system can refer to three characteristic lengths: The median length of feet for which a shoe is suitable.
Is a foot the size of a foot?
What is international foot?
An International Foot is one-third of the Imperial standard yard, which is defined to be 0.9144 meters (0.3048 m/ft conversion factor). This means that an International Foot is exactly 30.48 cm.
What is the difference between us foot and International foot?
A U.S. survey foot is expressed as a fraction — 1200/3937 meters — while an international foot is expressed as a decimal, exactly 0.3048 meters. That’s a difference of only one one-hundredth of a foot per mile. That’s why NIST and NOAA are retiring the U.S. survey foot and standardizing on the international foot.