Answer:

An inch is a unit of measurement in the imperial system. The width of a man’s thumb is about 1 inch. 1 inch is sometimes written 1”.

Its size can vary from system to system. There are 36 inches in a yard and 12 inches in a foot. A corresponding unit of area is the square inch and a corresponding unit of volume is the cubic inch.

The inch is the virtually universal unit of measurement in the United States, and is very commonly used in Canada and the United Kingdom. In the US, Canada and the UK, personal heights are expressed in feet and inches by people of all ages.