The color of basketball has not changed much. Almost all the basketball games are orange. But now the FIBA basketball is yellow, which stimulates people's vision to some extent.

Material, size and weight of ball:

1, the sphere must be round and orange in color, and the traditional eight-braid shape should be adopted.

The appearance of the ball must be made of leather, rubber or synthetic materials.

3. The air pressure in the ball falls on the playing field at a height of about1.80m from the bottom of the ball, and its rebound height shall not be lower than about1.20m or higher than about1.40m from the top of the ball.

4. The width of the spherical joint shall not exceed 6.35 mm. 。

5. The circumference of the ball should be no less than 74.9 cm and no more than 78 cm. The weight of the ball should be not less than 567 grams and not more than 650 grams.

According to the above rules, the game ball is unified.