Grab an officially licensed NBA game ball or snag a basketball with your favorite team logo and colors. Just because the FIBA ball was street legal in the NBA doesn't mean it was the same exact size as the Spalding NBA players were used to. So I called Spalding, and I just got an e-mailed response: Size 7 Basketball: For boys, a size 7 basketball should be used once they hit 14-years-old and is the official size used at the high school, college, and professional level. FIBA rules say that the ball should be a minimum of 29.5 inches and maximum of 30.7 inches (so the same or bigger). Teams are required to have a minimum of 14, except for a two-week period where they can have 13. Then he plays at the school yard (using a 28.5 ball and 10 ft. rim) and can't shoot more than a 9-footer. Feel like a pro when you hit the court with Spalding basketballs from NBAStore.com. Shop outdoor, indoor, and youth basketballs and take your game to the next level. It weighs 22 ounces. The NBA and WNBA NBA basketballs, according to USA Basketball, are 29.5 inches in circumference while the WNBA's basketballs have a maximum circumference of 29 inches.

Size 6 Basketball: For boys, a size 6 basketball should be used between the ages of 12 and 13.

So to answer the question, there are either 14 or 15 players on an NBA team in most cases. In June of 2006, the NBA announced that it was making a change. The circumference of the ball is 29.5 inches. Strictly made for the hardwood, it has a full grain leather construction that turns butter-soft once broken in.
Molten, who is the manufacturer of the balls used in FIBA tournaments, clarified that the balls it provides are 29.5 inches, identical to the ones used in NBA. The basketball goal is 18 inches wide (interior).

The circumference of the basketball should be 29.5" and the weight 22 oz. My question is: my son shoots great in the backyard with a great form with a 27.5 ball at a 9 foot rim. Once the regular season starts, however, an NBA team is only permitted to have up to 15 players through the duration of the regular season.
NBA rules say a ball's size should be 29.5 inches. For over three decades, Spalding has joined forces with the league to create the gold standard basketball. I couldn't agree with you more about your recommendation about right ball size for kids. A properly inflated ball of the correct size for level of play is important to ensure safety and skill development. This ball is designed to feel like second nature in the hands of the legends who wield it.

The width is approximately 9.39 inches.