United States customary units form a system of measurement units commonly used in the United States and most U.S. territories since being standardized and adopted in 1832. The United States customary
A tape measure with markings in inches, feet and centimeters
A 23.7 US fl oz (700 mL) bottle displaying both U.S. and metric units
Inch
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The inch is a unit of length in the British Imperial and the United States customary systems of measurement. It is equal to 1/36 yard or 1/12 of a foot. Derived from the Roman uncia, the word inch is
United States customary units
…National Bureau of Standards, although "English units" is sometimes used in colloquial speech. For measuring length, the U.S. customary system uses the inch, foot, yard, and mile, which are the only four customary length measurements in everyday use. From 1893, the foot was legally defined as exactly 1200⁄3937…
A measuring tape with inches
A fire hydrant marked as 3-inch
Mid-19th-century tool for converting between different standards of the inch
Set of gauge blocks from 1919