Inch (_) is the unit of length used by Britain (UK) and its former colonies, generally 1 inch =2.54 cm. In English, 12 inch is 1 foot, and 36 inch is 1 yard.

Inches (abbreviated as in. In Dutch, it means thumb, and one inch is the width of ordinary people's thumb at the bottom of their nails. Of course, people's thumb width is also different. /kloc-In the 4th century, King Edward II of England promulgated the "standard legal inch". It is stipulated that the three largest wheat grains should be selected from the middle of the barley ear and arranged in a row one inch in length.