Basketballs used in the NCAA are between 9.39 and 9.55 inches for the men and 9.07 and 9.23 inches for the women. Indoor vs. Outdoor Basketballs (a.k.a. “Street” Basketballs)
NCAA: The key is 12 feet wide. NBA: The key is 16 feet wide. For a better frame of reference, here are the court dimensions for the NCAA and NBA: NCAA court dimensions:
Compare basketball court sizes. The standard hoops court is a rectangle 94 feet by 50 feet. ...
NBA: 24-second shot clock, with 8 seconds to cross half court; NCAA: 30-second shot clock, with 10 seconds to cross half court; 3-Point Line. NBA: 23’9’’ from hoop; NCAA: 19’9’’ from hoop; Width of paint under hoop. NBA: 16 feet wide; NCAA: 12 feet wide; Fouls. NBA: 6 personal fouls before fouling out. After 4th team foul in a quarter opponents get 2 free throws.
National Collegiate Athletic Association (NCAA) – Men. The requirements of this association are not as stringent as compared to the National Basketball League (NBA) or International Basketball Federation (FIBA). A size 7 ball is the standard for men’s tournaments.
Basketball Size Circumference Weight Recommended Age; Size 7: 29.5 Inches: 22 oz: Teenager boys above 15 and adult men. This is official size of professional (like NBA), high school and college basketball leagues. Size 6: 28.5 Inches: 20 oz: Official size for women basketball professional, high school and college leagues.
An official NBA basketball weighs 22oz and has a circumference of 28.5 inches. These are size 7 basketballs and all men’s professional basketball associations including college and high school basketball leagues use the same ball. The NBA used to get all its basketballs from Spalding which was producing NBA’s official game balls since 1983. However, the NBA switched to Wilson after the 2019-20 season.
The standard basketball used on most NBA games measures 29.5 inches in circumference, also known as a size #7. This is also the same size that is used by NCAA College and HS basketball leagues for male players.