1 inch is about 3.33 cm, and 1 inch is 2.54 cm, so the inch is larger than the inch. "Inch" is a traditional unit of length in China, with "ruler" and "ruler" as decimal, 10 inch = 1 ruler,1ruler = 1 ruler. Korea is used to express the number of relatives, such as 1 inch for lineal relatives of two generations. Hong Kong's laws follow the ancient system (1 inch =3.33 cm), but this kind of unit in Hong Kong is hardly used, only "inch" and "centimeter" are used.

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.