What are the general specifications of football? What is the difference between the size of a soccer

Mass and measurement Ball · round ; Made of leather or other appropriate materials; The circumference is not longer than 70 cm (28 inches) and not shorter than 68 cm (27 inches); The weight is not more than 450 grams (16 pound taels) and not less than 410 grams (14 pound taels) at the start of the race; The pressure at sea level is equal to one atmosphere (600 1100 grams square centimeter, pounds square inches). Replacement of Bad Ball if the ball is broken or damaged during the game; Stop the game; - Restart the game with a dropped ball at the location where the original ball was broken. If the ball is broken or damaged during a dead ball such as a kick-off, goal kick, corner, free kick, penalty kick or throw-in:

Restart the match in accordance with the appropriate regulations. The ball may not be changed during the match without the permission of the referee. FIFA Resolution 1 Only football that meets the minimum technical requirements set out in Chapter II of the Rules may be used in matches.

In tournaments sponsored by FIFA and the Intercontinental Federations, the ball used must bear one of the following three symbols: first, the official "FIFA approved" logo; second, the official "FIFA supervised production" logo; The third is the proven "International Match Ball Standard". The presence of these marks on the ball indicates that the ball has been officially inspected and meets the special technical requirements specified by each class.

The minimum technical requirements for the ball are stated in Chapter II of the Rules. These special requirements related to the various levels must be agreed to by the International Football Council. The relevant testing agency must also be approved by FIFA.

National Football Associations may require the use of a ball that meets one of the above three symbols. Other match balls must comply with the requirements of Chapter II of the Rules. Resolution 2 No commercial advertisements shall appear on the ball in competitions sponsored by FIFA, continental federations and national associations, except for the logo of the match and the organizer of the match and the trademark of the manufacturer.

Competition regulations may limit the size and number of such signs.

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 at the start of the game shall not be more than 453 grams or less than 396 grams, and its pressure after inflation shall be equal to 0 6 - 1 1 atmospheres (at sea level), i.e. equal to 600-1100 grams of centimeters.

During the game, the match ball may not be changed without the permission of the referee.

Resolution I of the International Council.

1.The ball used in the game is the property of the association or club to which the playing field belongs, and the ball shall be handed over to the referee at the end of the game.

2.The International Council determines the material used to make the balls at any time. Any licensed material shall be approved by the International Council.

3.The rules approved by the International Council set the equivalent weight of a ball: 14 to 16 taels equal to 396 to 453 grams.

4.If the ball breaks or leaks air during the game, play should be stopped immediately and play should be resumed with a new ball at the point where the original ball was broken. Play shall resume unless the ball is in the goal area at the time the ball is in the goal area, in which case the ball shall be dropped on the line of the goal area parallel to the goal line closest to the point where the ball is located at the time play is stopped.

5.If the ball is broken in the event of a dead ball, the new ball shall be applied to the appropriate referee and shall be exchanged at the time of the match.

6.If you do not do this, you will be treated as a non-substitute player.

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 is not longer than 70 cm and not less than 68 cm; The weight is between 410 and 450 grams.

The size of the football is distinguished:

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.

Soccer model:The model of the football is divided into 1-7 balls, the 1 ball is often used as a decoration or for playing in the palm of the hand, the size is about the size of a palm, the diameter of the ball is slightly larger than the 1 ball, most of the balls for young children to play, in fact, the difference with the 1 ball is not too obvious, the diameter is about 16cm.

No. 3 football began to have a strict size limit, No. 3 football is mostly used as a children's training ball, for 5-12 years old children, the regular No. 4 ball and No. 5 ball are too large, which is not conducive to children's training, generally the diameter of 18cm is the best.

No. 4 football is mainly used for 5-a-side events and 7-a-side games, or field football, as well as the popular cage football ball in Europe and the United States, and some 9-a-side games also use the ball, which is generally about 20cm, and is common between.

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.

Types of football: 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.

Materials and standards for football.

The balls are round, made of leather or other suitable materials, and are usually made of 12 pieces of black pentagonal fabric and 20 pieces of regular 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 must not exceed 450 grams (16 ounces) and not less than 410 grams (14 ounces) at the start of the match.

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 not in play, such as a kick-off, goal, corner, free kick, penalty or throw, the ball breaks or is not up to standard:

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

The ball shall be round in the shape of the ball, and 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'.

During the match, the match ball may not be changed without the permission of the referee.

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