Size 28 is 2.1 feet, 29 is 2.2 feet, 30 is 2.3 feet, 31 is 2.4 feet, 32 is 2.5 feet, and 33 is 2.6 feet.

The size 28 and 29 labeled on the pants are calculated in inches. And what we often call 2'1 (2.1 feet) and 2'2 (2.2 feet), the unit of calculation is city feet.

The conversion is: 1 inch = 0.0762 city feet = 2.54 centimeters; 3 feet = 1 meter, 1 foot = 33.33 centimeters.

Size 28 = 2.1 feet = 70 centimeters, 29 = 2.2 feet = 74 centimeters, 30 = 2.3 feet = 78 centimeters, and so on.

According to China's relevant national standards, clothing sizes for adult men and women are expressed in a numbering system.

Other than that, we usually see such as S, M, L (usually used in casual wear), or 27, 28, 29 (usually used in pants), or 44A, 44B, 46A (usually used in suits) and other methods of labeling are not standardized, just that we are accustomed to, and many brands will be in the number of system in addition to complementary to the customary labeling method.

Expanded:

Generally speaking, there are several ways to indicate the size of pants:

1, if it is the "175/80A" this kind of, then the front 175 indicates the height (centimeters), the back of the 80 indicates the waist (centimeters), A indicates the body type (A is normal, B is fat, C is fat, Y is thin).

2, if it is "W31 L34" this, W said the waist circumference, L said the length of the pants (that is, from the crotch of the cross seam to the leg of the straight line distance).

3, if it is "28", "29", "30" such, generally refers to the waist. The general statement is: men's pants 28-42 refers to the inch size, 21-31 refers to the city inch size, women's pants 21-38 is the inch size, 18-28 is the city inch size. Size numbers 28-33 range minus 7 is the waist size, for example: 28 yards of pants, minus 7 is 21, that is, 2.1 feet waist.

Baidu Encyclopedia - Clothing Size

Baidu Encyclopedia - Inches