How big is football? How much is the right height for football

The soccer ball is round, made of leather or other suitable material, and is usually made of 12 pieces of black pentagon fabric and 20 pieces of hexagonal fabric. The circumference of the sphere shall not exceed 70 cm (28 inches) and shall not be less than 68 cm (27 inches). The weight of the ball, at the start of the game, must not exceed 450 grams (16 ounces) and must not be less than 410 grams (14 ounces).

The air pressure of the ball, at sea level, is to atmospheric pressure (600 grams to 1100 grams per square centimeter to pounds per square inch). Replacement of a substandard ball If, during a match, the ball breaks or is substandard: Play is stopped.

Replace the standard ball, and at the point where the ball breaks, the falling ball restarts the game. If the ball is in the goal area at that time, the place where the ball falls is on the goal area line parallel to the goal line, closest to the position of the ball at the time the play was stopped. If the ball is broken or out of standard if it is not in play, such as a half-time kick-off, goal kick, corner, free kick, penalty kick or throw

Restart the game according to the rules. During the game time, the match ball cannot be changed without the consent of the referee.

The size of the soccer ball is between 685mm and 695mm.

The weight of the soccer ball is 265g

The circumference of a football must not be more than 71 cm or less than 68 cm.

When the football is inflated, its pressure should be equal to 0 6-1 1 atmospheres (at sea level), i.e. equal to 600-1100 grams'.

The outer layer of the soccer ball is made of cowhide, and then a layer of cotton cloth is attached to the rubber bladder. However, there is already a new material to replace cowhide.

Soccer is based on Jamalfors's law, which is 89-e-rts=st-t=p according to Jamalfors's law.

The soccer ball has 32 pieces of leather, generally made up of black and white, 12 black pentagons, and 20 white hexagons.

Soccer height to fit.

The best height for a footballer should be, especially for strikers and midfielders, who are too short to have an advantage, and they don't run very fast, after all, it's not Maradona and Messi. If you are too tall, you must be a little clumsy, and you will definitely not be able to keep up with the physical fitness of running back and forth a few times.

The essential elements of a good footballer

1. Speed, explosiveness, coordination, especially the premise of maintaining the physical ability to run for 90 minutes.

2. Psychological characteristics of self-confidence, decisiveness, willpower and attention.

3. Quickly, skillfully and accurately complete the technical foundation of offensive and defensive techniques, especially positional techniques.

4. Highly understand the game environment and situation in the state of having and without the ball, and make reasonable decisions about the tactical awareness and ability of actions in the right time and place.

Football player rankings

1. Messi

Messi's full name, Leonel Andrés Messi Cusitini, nicknamed Leo Messi, is a unique and unique presence in today's football. Born in 1987, he came through the La Masia Academy and signed a contract with Barcelona on a tissue in 2004.

2, Ronaldo

Ronaldo, whose full name is Cristiano Ronaldo, was born in Portugal in 1985, is one of the most famous stars in history and a peerless idol for nearly 20 years.

3. Neymar

Neymar is widely regarded as the most delicate player in the world, and he has a long name: Neymar da Silva Santos Júnior, but fans always like to call him "Horse". Neymar has a balanced left and right feet, can hit high-quality shots with both feet, the style of the ball is chic and gorgeous, and the kicking is not only highly skillful, but also unparalleled ornamentation, and he is a well-deserved samba dancer on the green field.

Specifications of various footballs:

The ball, with a diameter of centimeters, is a regular 11-player ball.

Ball size, 19 cm in diameter, 5 or 7 player match ball.

The ball, 18 cm in diameter, is used for children to train and learn.

Ball, 15 cm in diameter, for children's play.

Ball, 8 cm in diameter, for children's play.

Football Type:1. Indoor football.

It's harder than a normal soccer ball and feels heavier in your hand. The main reason is that the indoor court is a solid wood floor, and unlike the outdoor, the indoor ball is generally controlled under the feet, in order to prevent the football from bouncing too high after landing, the material selection is different. Inflated sufficiently, pick up and let go, and the bounce is not high for indoor balls.

2. The machine sews the football.

There are two types of balls. The ball is soft to the touch, feels very good, has sufficient elasticity, and is waterproof (these points are very similar to the game-specific football), but the stitches are very thin and dense, and the gap between the two seams is large, which leads to a short service life. The other** is similar to the previous one, but the stitches are thicker, the threads can be hidden in the seams, and the touch on the ground ** is also good, but the disadvantage is that it is harder, heavier, and more laborious to kick.

3. Authentic game balls.

The ball is natural latex, oval (does not affect the trajectory of the ball), the ball feels soft, elastic, and waterproof. The stitches are hand-sewn, generally sewn by handicraftsmen in China and Southeast Asia, India, generally only 1 or 2 can be sewn in 1 day, and the thick thread is almost hidden in the sewing block. The disadvantage is that it is inflated before each kick (determined by natural rubber), and it can be used for 3 to 4 hours after flushing.

Five-year-olds are suitable for carrying a size 3 soccer ball (18 cm diameter), and the standard soccer ball is a size 5 soccer ball (cm diameter).

As the child grows up, change to the standard ball, which will not affect the child's ability to play the standard ball.

Before 1872, there were no official rules for the size of football, and the size of the ball was varied. The British first thought of setting the size of the football, and in 1872 the FA stipulated that the circumference of the football must be between 27 and 28 inches (i.e. to the centimeter). In 1973, the weight of the soccer ball was regulated, between 410 and 450 grams, and the circumference was limited to 68 to 70 centimeters.

We know that football has always followed this specification until now.

The circumference of a standard soccer ball should not be longer than 70 centimeters and no shorter than 68 centimeters.

From this, it is estimated that its diameter is between centimeters and centimeters.

The weight is between 396 grams and 453 grams.

The rules of the soccer game regarding the match ball:

The ball shall be round, its shell shall be made of leather or other permitted material, and no material may be used in its construction that may injure the player.

The circumference of the ball must not be more than 71 cm or less than 68 cm. The weight of the ball, which must not be more than 453 grams or less than 396 grams at the start of the game. After inflation, the pressure should be equal to 0 6-1 1 atmospheres (at sea level), i.e. equal to 600-1100 grams'

According to this calculation, the radius of the football should be between centimeters.

The circumference of the ball for official matches is 68cm-71cm