The sizes of men's belts in the United States are 26, 28, 30, 32, 34, 36, 38, 40, 42 and 44 respectively, and the corresponding sizes in China are 1.83-2. 13 feet, 2-2.3 feet and 2.13.
Especially when buying a belt, you can buy a belt of 1-2 size; American belts generally have five buttonholes, and the spacing between adjacent buttonholes is about 2.5 cm; For perforated belt, the size generally corresponds to the waist circumference surrounded by the hole in the middle; And be sure to choose the belt according to the size of pants, not according to the bare waist.