1. In order to make the measurement accurate, the surveyor needs to leak the whole waist and stand naturally. In order to distribute the weight evenly, the feet need to be separated by 25 to 30 centimeters.

2. Find the measuring position. Everyone's physical growth is different, and the measurement position is different. The measuring positions of low waist, middle low waist, middle waist and high waist are as follows:

(1) Low waist: measure waist circumference 2 inches below navel;

(2) Mid-low waist: measure waist circumference below navel 1 inch;

(3) Middle waist: measure the waist circumference at the navel position;

(4) High waist: Measure the waist circumference above the navel 1 inch (that is, the thinnest waist circumference of the human body).

When measuring, we need a tape measure around the waist. When measuring, be careful not to press the measuring position, and keep the ruler slightly relaxed (but not too relaxed), otherwise the measuring result will be affected.

4. To know how to use the tape measure, it is best to use a tape measure with a value, find an accurate value at one end of the tape measure, find the position of the other end around the waist with the initial value, and then subtract the previous value from the later value to get the specific waist circumference.

5, to measure for many times, repeat the measurement for more than three times, if the measurement results are not accurate, can use the average of the measured values for many times.

Conversion units involved in measuring waist circumference:

1, 1 m =3 feet, 1 ft = 10 inch, 1 ft =33.333 cm = 0.3333 m, 1 inch =3.3333 cm,/.

2. When buying pants, it is very important to determine your waistline. The correct method of measuring waist circumference can make you measure it more accurately. The calculation method of converting the measurement results in feet into trousers size is as follows:

(1) Rough calculation method: female waist size +6, for example, 1 foot 8, that is, 18+6=24 yards. Male waist size +7~~9, for example, 2 feet 7, that is, 27+9=36 yards.

(2) Accurate calculation method: Use your waist size x 13. 1 and then round it to get the accurate size. For example, 2' 4 waist, 2.4×13.1= 31.4 = 31code.

Select the corresponding pants size table as follows:

Definition of waist circumference:

Waist circumference refers to the horizontal circumference of the waist through the umbilical point (om), which is a comprehensive index reflecting the total fat and fat distribution.

Waist circumference is a barometer of health. People care about their weight, but they should pay more attention to their waistlines. A large-scale medical survey of more than 350,000 people by European researchers found that if a person's waistline is too large, it will not only be unsightly, but also hide health risks: the risk of premature death of a person with a large waistline can be twice as high as that of a normal person.