1 inch =2.5400 cm, which means 5 inches = 12.7 cm.
Inch (inch) is the unit of length used by Britain (UK) and its former colonies, generally1in = 2.54cm. In the British system, 12 inch is 1ft, and 36 inch is 1yard.
Cun (pinyin: cùn) is a first-class Chinese character (commonly used word) in the General Standard of Chinese, which first appeared in the Warring States script. In ancient Chinese characters, inch consists of "you" representing the hand and "one" representing things. The original meaning refers to the one-inch long part from the palm to the wrist, that is, the "inch mouth", and the extension refers to the length unit with the inch mouth as the degree. Because inch is a small unit of measurement, it is also used to describe tiny or extremely short.
Interpretation of ancient books
The origin of Chinese characters
Roll up the three-inch warehouse (cê n).
Ten points. A human hand is one inch, and an artery is called one inch. From one to the other. Every inch belongs to an inch.
[Note] From the first article: Xu Kai's Biography of Shuowen Jiezi: "First, remember the inch under the wrist. This refers to things. "
The above contents refer to Baidu Encyclopedia-Inch.