What is the weight and size of football? How many sides?

Fifa recognized eligibility criteria: the circumference of the ball should not be greater than 7 1 cm or less than 68 cm. The circumference is between 68.5 cm and 69.5 cm, and the radius of the football should be between 10.8- 1 1.3 cm.

Fifa's acceptance criteria: the weight of the football at the beginning of the game should not exceed 453g or less than 396g, and the pressure after inflation between 420 and 445g should be equal to 0.6- 1. 1 atmospheric pressure (sea level), that is, equal to 600-1kloc-0/00g/cm.

Traditional football consists of 32 sides, each of which is a piece of leather; These 32 faces are divided into two types, one is a regular pentagon, and *** 12 faces are generally black; One is a regular hexagon with 20 faces, usually white.