In regular basketball games, there are four types of basketballs, namely: #3, #5, #6, and #7. The difference between these four types of basketballs is their weight and circumference. 1. Children's game ball: weight 300-340g, circumference 56-57cm, size #3 basketball; 2. Youth game ball: weight 470-500g, circumference 69-71cm, size #5 basketball; 3. Standard women's ball Game ball: weight 510-550g, circumference 70-71cm, size #6 basketball; 4. Standard men's game ball: weight 600-650g, circumference 75-76cm, size #7 basketball.

Extended information:

In regular basketball games, the basketball used in the game should meet the following standards:

1. The ball should be round for approval. Pure orange with 8 custom shaped panels and black seams. 2. The outer shell should be made of leather, synthetic leather, rubber or synthetic materials. 3. After inflating, the ball will drop to the court ground from a height of approximately 1.80 meters (measured from the bottom of the ball), and the height of the rebound will be between 1.20 meters and 1.40 meters (measured from the top of the ball). 4. The excessive connection of the ball shall not exceed 0.635 cm. The circumference of the ball shall not be less than 74.9 cm and shall not be greater than 78 cm (size 7). The weight must not be less than 567 grams and not exceed 650 grams. 5. The home team shall provide at least two used balls according to the above specifications. The referee is the only person who determines whether the ball is up to standard. If it is determined that neither ball is suitable as a match ball, the referee may choose the ball provided by the away team or one of the balls used by both teams for pre-match preparations.