thumb

An inch is a unit of measurement used to measure length. In most countries, an inch is referred to as an English inch (inch) and is standardized to a value of 2.54 centimeters. This thumb is mainly used in Anglo-Saxon countries such as the United States, Great Britain and Canada. Originally, lengths were measured in inches based on the size of the human thumb, where the length of the thumb was taken as the base unit. Gradually, the inch became the official unit of measurement, especially in Anglo-Saxon countries. Today, the inch unit is widely accepted and used in various fields such as engineering, construction, electronics, etc.