What do you think of the numbers on the tape measure?

Generally, the label is calculated in millimeters, one cell is one millimeter, and 10 cells are one centimeter. 10, 20 and 30 are 10, 20 and 30 cm.

The main type of tape measure is steel tape measure, followed by fiber tape measure, which is often seen by people. Many people say it's the amount of cloth, as well as the waistline (tailor's amount/clothing amount belongs to this category). In southern China and Hongkong, the tape measure is usually called a soft ruler or a ruler. Its material is PVC plastic and glass fiber, which can prevent the tape measure from being elongated during use.

The tape measure is usually metric, with 150 cm on one side and 60 inches on the other. Inch is a commonly used unit of measurement abroad, and the size unit of TV sets and monitors is inch. Jeans are also measured in inches. In China, tape measures are usually used in cities. One side is 150 cm and the other side is 45 inches. It is often said that 2 feet 1, 2 feet 2 waist, is the unit of city inch.