Method For Measuring Foot Shape

The measurement of foot type includes indirect measurement and direct measurement.

In the last section, foot length measurements by footprints are all indirect measurements.

The direct measurement of the foot will be introduced in this section.

For each pair of feet, the size of the foot changes slightly with the change of external conditions.

First of all, we should know that the human left and right feet are basically symmetrical, and they are not exactly the same in length.

For most people, the activity of the right foot is greater than that of the left foot, so that the length and circumference of the right foot are generally larger than that of the left foot.

In the foot type measurement, the right foot is generally measured.

Of course, when choosing shoes, two feet should be tried to prevent accidents.

As the weight of the human body increases the bearing capacity of the foot, the arch of the foot disappears, resulting in changes in length and width.

When the weight of a person is concentrated on one foot, the length can increase by 3mm, the width can be increased by 2~5mm, and the circumference can be increased by about 10mm.

When designing shoe last, we must consider the dynamic change of feet.

When choosing shoes, you should not just try it on, but also stand up and take a walk.

In summer, when the weather is hot, the heat dissipation of the feet is also large, the blood vessels are dilated and the feet are larger in size. In winter, the weather is cold. In order to reduce the heat emission, the whole foot is in a state of contraction, and the size of the feet is correspondingly smaller.

In foot type measurement, they are usually selected in summer.

Generally speaking, with the increase of heel, the force of the forefoot increases, the girth of the foot increases, the foot bottom force decreases, and the length of the small foot tars decreases.

When designing heels and heels for high heels, we should consider the changing rule of the foot plantar circumference and the foot tarsal circumference.

At the measurement site, see Figure 4-11 and plantar circumference: the foot metatarsal refers to the girth measured by the first metatarsophalangeal joint and the fifth metatarsophalangeal joint.

Also known as metatarsophalangeal girth.

The foot and metatarsal circumference is the main sign of fat and thin feet.

2, tarsal circumference: the foot tarsal circumference refers to the girth measured by the anterior tarsal point and the fifth metatarsal tuberosity.

3, pocket Wai: toe pocket refers to the girth measured by the heel and the bending point of the boat.

4. Wrist circumference: the wrist circumference refers to the girth on the side of the finest part of the wrist.

5, leg belly: leg girth refers to the girth on the side of the thickest part of the calf.

6. Below knee circumference: the knee circumference refers to the girth measured by the lower edge of the upper part of the fibula.

The shoe belt ruler is a soft gauge with a width of 8mm long 50mm, the front is centimeter scale, and the back is the sign of the British and French shoes.

The barefoot of the right foot stood steadily and was measured by another person.

If the error caused by the measurement is large, it can be used as a measurement exercise.

The measurement steps are as follows:

3. When measuring the six circumference, the tape should be placed flat on the skin. It should not be too tight or too loose.

4. After crossing the tape ruler for one week, the cross reading values are all circumference values.

5. Record the values of the circumference measured.

Four, the circumference coefficient of feet

The circumference coefficient of the foot refers to the percentage of the circumference of each characteristic part of the foot and the length of the foot and plantar circumference.

Circumference coefficient = characteristic part circumference / foot plantar circumference

A large number of measured data can be used to collate regular values.

See table 4-1.

In the formula of the table, S represents the foot plantar circumference, l means the foot length, and N means the fat type of the foot.

Through pformation, we can get:

N = S- (0.7l+50.5) / 7

The fat type of the foot can be calculated from this.

Example 1: measure a man's foot length 254.5mm, the metatarsal circumference 246mm, seek the fat and thin type of his feet.

Known: S = 246mm L = 254.5mm

Ask: N =?

Solution: N = S- (0.7+50.5) / 7 = 246- (0.7 x 254.5+50.5) / 7 = 17.35 / 7 = 2.48[two type half]

Example two: the length of a woman's foot was 231.5mm, and the length of the metatarsal was 223mm.

Known: S = 223mm L = 231.5mm

Ask: N =?

Solution: N = S- (0.7L x 231.5+50.5) / 7 = 223- (0.71 x 231.5= = 50.5) / 7 = 1.49[one half]

For fat and lean children, the formula is slightly changed: N = S - (0.9l+4.5) / 7

Example three: the foot length of a child is 164mm and the 166mm of the plantar is measured.

Known: S = 166mm L = 164mm

Ask: N =?

Solution: N = S- (0.9l+4.5) / 7 = 166- (0.9 x 164+4.5) / 7 = 1.99[two]

The coefficient of tarsal circumference in the table is a regular value. The length of the tarsal girth of the human foot is not equal to the length of the metatarsal in most cases. It is long and short. When determining the value of the foot type, it stipulates that the length of the foot metatarsus is equal to the girth length of the foot, so that it is convenient for memory and use.

Therefore, there are: foot tarsus =100% foot metatarsal circumference about foot pocket girth girth girth and knee circumference. In designing boots products, this is a set of commonly used data.

It should be noted that the weight and weight of the calf are related to the muscle of the calf, but not directly related to the length of the leg.

Five. Content of foot height measurement

The height of the foot refers to the height of the characteristic part of the foot, which is measured by the distance from the various points of the foot to the horizontal plane.

See Figure 4-21 and below knee height: the knee height is measured in the measurement of the lower knee circumference.

2, the height of the calf: measuring the height of the calf by measuring the circumference of the calf.

3. Wrist height: wrist height is measured in the measurement of wrist circumference.

4. The height of the inferior border point of the external center of the bone is measured at the lower edge point of the outer bone center.

5. Heel height: measure in the most prominent position of heel.

6. The height of the upper bend of the boat is to measure the height of the upper bend of the boat.

7. The height of the anterior tarsal point: after the plation of the height of the anterior tarsal point.

8. Height of the first metatarsophalangeal joint: measure the height of the first metatarsophalangeal joint after plation.

9. Thumb height: measure the maximum position of thumb after plation.

Six. Method of measuring foot height.

When height is measured, the height gauge is usually used for measuring.

It can also be replaced by a longer ruler and a triangular plate.

The measurement steps are as follows:

1. When using the height gauge, the pointer of the height can be pointed at the characteristic part of the foot, and then the data can be read out from the height ruler.

2. When you use a ruler, you can directly measure the height of the knee below the height of the knee, the height of the lower edge of the outer wrist, the height of the heel and the height of the heel.

3. When using the ruler to measure the height of the upper tarsal point of the upper bend point of the boat, the height of the first metatarsophalangeal joint is higher than that of the thumb height.

4, record the measured height values.

Seven. The height coefficient of the foot.

The height coefficient of the foot refers to the percentage of the height of the foot's characteristic part and the length of the foot.

Note that the denominator is the foot length rather than the foot plantar circumference.

Height coefficient = height / foot length of feature position

Through a large number of measurements, the regularity values can also be sorted out.

See Table 4-2.