The feet and inches system was invented in Britain; it's called the Imperial System in Britain as it was manditory in the British Empire.
Nowadays, most commonwealth countries have switched to the metric system - even Britain is officially metric although feet and inches are widely used, speed limits must be in mph and road signs are almost entirely in miles, yards or feet.
Apart from Britain, feet and inches are used in the USA. There are also occasional usages in Canada, Australia, New Zealand and other commonwealth and other former imperial countries.
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They are the U.S. measurements. Instead of the Metric system that uses meters, the Customary system uses feet and inches.
Scientists use meter and centimeter rather than inches and feet because they have to share their results with other countries. America is the only country that uses feet and inches while the rest of the world uses the metric system.
The imperial system - so called because of its wide-spread use across the British Empire.
Different measuring systems use different units of measurement. The United States still uses feet and inches simply because it has not converted to the system used by the rest of the world.
Feet, inches, and miles are part of the English system of measurement.