
Basketballs come in a variety of sizes, with the size depending on the player's age, gender, and level of play. The size of the basketball is important for skill development, especially for younger players. The official size of the basketball used by the NBA is 29.5 inches in circumference, while the WNBA uses a slightly smaller ball, measuring 28.5 inches in circumference. This size is also used for women's high school, college, and professional teams. For international play, the basketball used is slightly bigger, with a 30.7-inch circumference for men's basketball and 29 inches for women's.
| Characteristics | Values |
|---|---|
| Circumference | 29.5 inches |
| Diameter | Between 9.43 and 9.51 inches |
| Weight | 22 ounces |
| Inflation Pressure | 7.5 to 8.5 PSI |
| Size | 7 |
| Gender | Male |
| Age | 15 years old and older |
| Leagues | NBA, College, and High School |
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What You'll Learn

NBA basketball size
The official size of the basketball used by the NBA is 29.5 inches in circumference, which is also known as a "size 7" basketball. This is the standard size used in men's college and high school basketball leagues. The ball weighs 22 ounces and must be inflated to a pressure of 7.5 to 8.5 pounds per square inch (PSI). Using the correct basketball size is crucial for proper skill development, especially for young players who are learning the game.
The WNBA uses a slightly smaller basketball, measuring 28.5 inches in circumference, which is the same size used in women's college and high school basketball. This is referred to as a "size 6" basketball and weighs 20 ounces. For international play governed by the FIBA, the basketball size used for both genders is slightly bigger. It is 30.7 inches in circumference for men's basketball and 29 inches for women's basketball.
Basketball sizes vary by age group, gender, and the level of play or league. For boys and girls between the ages of 4 and 8, a basketball between sizes of 22 and 24.5 inches in circumference is recommended, depending on the individual's hand size. From ages 5 to 8, a "size 4" basketball is used, which is the next size up for children to play with and develop basic skills. For ages 9 to 11, a "size 5" basketball is used, which is the standard youth size for team play. Boys in middle school (ages 12-14) use a "size 6" ball, which is also the size used by girls over the age of 12. Men aged 15 or older use the official "size 7" basketball.
It is important to note that using a basketball that is too big or too heavy for a young player can lead to bad habits and a less enjoyable experience. The proper size basketball is necessary to teach proper hand placement, passing, dribbling, and shooting techniques.
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WNBA basketball size
Basketballs come in a variety of sizes, depending on the age, gender, and level of play of the players. It is important to use the correct size basketball to ensure adherence to competition rules and to facilitate the development of key basketball skills such as shooting, dribbling, and receiving the ball.
The official basketball size for the Women's National Basketball Association (WNBA) is 28.5 inches in circumference, which is equivalent to a size 6 basketball. This size is also used in women's college and high school basketball leagues. The WNBA basketball weighs 20 ounces and must be inflated to a pressure of 7.5 - 8.5 pounds per square inch (PSI), the same pressure regulation used in the NBA.
The size 6 basketball is the first size where boys and girls are separated into different groups. Girls aged 12 and above use this size, while boys in middle school also use size 6 basketballs until they reach high school. The size 6 basketball is also the official size for women's professional, high school, and college teams.
Using a basketball that is too big or too small can negatively impact a player's experience and performance. A basketball that is too big for a young player can make the game less enjoyable as it will be harder to control when dribbling and more difficult to pass or shoot accurately. Similarly, using a basketball that is too small can cause issues when transitioning to playing with a larger, heavier ball.
The WNBA basketballs are known for their distinctive orange and white colours, which were introduced in 2013 to match the signature colours of the league and to help brand the WNBA.
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FIBA basketball size
Basketball is a popular sport that is played by people of all ages, genders, and skill levels. The size of the basketball used in a game will depend on the age, gender, and level of play of the players.
For international basketball games, the basketball size used for men's games is slightly bigger than the basketball used in the NBA, WNBA, NCAA, and other leagues. The men's basketball for international play, governed by the FIBA, has a circumference of 30.7 inches, while the women's basketball has a circumference of 29 inches. These basketballs are made by Molten and are called the Molten GL7 for men and the Molten GL6 for women. The official rules for FIBA play state that the basketball must be inflated to a certain air pressure such that when dropped onto the playing floor from a height of approximately 1,800 mm, measured from the bottom of the ball, it will rebound to a height of between 1,200 mm and 1,400 mm, measured to the top of the ball.
The NBA and WNBA use basketballs with a circumference of 29.5 inches and 28.5 inches, respectively. These basketballs are made by Spalding and are used in both men's and women's leagues. The NCAA and most youth leagues use basketballs made by Wilson. The NBA, WNBA, and NCAA all use the same inflation requirements as FIBA, with a pressure of 7.5 to 8.5 PSI.
The size of the basketball used can have a significant impact on the player's performance, development, and enjoyment of the game. For youth players, the older the player, the bigger the size of the basketball they will use. It is important for young players to use the proper size and weight of the basketball during their development to ensure they are using the correct ball handling and shooting techniques. If the basketball is too big or too heavy, it can lead to a less enjoyable experience and make it harder for the player to control the ball when dribbling, passing, or shooting.
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Youth basketball size
The size of basketball used depends on the age, gender, and level of play or league of the player. It is important to use the correct basketball size to develop proper ball handling and shooting techniques. Using a basketball that is too big or too heavy can lead to bad habits and cause players to lose interest in the game.
For youth basketball, the older the player, the bigger the size of basketball they will use. The standard youth size for team play is a size 5 basketball, which is used by boys and girls ages 9 to 11. This size is also referred to as "junior" or "size 5" balls. Size 5 basketballs measure 27.5" in circumference and weigh 17 ounces.
For younger children, a size 4 basketball is used by boys and girls ages 5 to 8. This size is also called a rookie or "size 4" basketball. These balls measure 25.5" in circumference and weigh 14 ounces.
Size 3 basketballs are mostly just for fun or to collect. They are used by children ages 4 and under and are not meant for rule-based games.
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Basketball size by age
The size of a basketball impacts player performance, development, and enjoyment, so it is important to choose the right size for your age, especially for young players who are learning the game. Using a basketball that is too big at an early age will lead to a less enjoyable experience, as the heavier ball will be harder to catch, control, pass, or shoot accurately.
Basketballs come in various sizes, from size 3 to size 7. Size 3 is a novelty-sized or 'mini' basketball suitable for children aged four and under. It is mostly just for fun or to collect. For children aged 5-8, a size 4 basketball is recommended. This size is not for rule-based games but for getting familiar with the ball and developing basic skills.
For youth basketball players aged 9-11, a size 5 basketball is the standard size for team play. This is when kids start learning the rules of the game and play against opposing teams. Size 5 basketballs have a circumference of 27.5" (69.5 cm) and weigh 17 ounces.
A size 6 basketball is used by girls over the age of 12 and is the official size for women's high school, college, and professional teams. Boys in middle school also use this size until they reach high school. Size 6 basketballs have a circumference of 28.5" (72.5 cm) and weigh 20 ounces.
Finally, the official size of men's professional basketball is size 7, suitable for players aged 12 and over. Size 7 basketballs have a circumference of 29.5" (75 cm) and weigh 22 ounces. This is the size used in the NBA, as well as in college and high school basketball leagues.
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