1In
1 inch, often written as 1 in, is a unit of length in the imperial and United States customary systems. It is exactly 2.54 centimeters (25.4 millimeters). Defined in 1959 as 1 inch equals 1/36 of a yard, since then 1 yard equals 3 feet and 1 mile equals 63,360 inches.
In typography, 1 inch equals 72 points, with a point defined as 1/72 of an inch, and
In computing and web design, CSS uses the inch as a length unit, with 1in defined as
Notation and history: the abbreviation 'in' is widely used, and the inch can be denoted by the
Usage: inches are common in design, manufacturing, construction, maps, and consumer products in the United States