
Basketballs come in a variety of sizes, with the size depending on the age, gender, and level of play of the player. A size 7 basketball, with a circumference of 29.5 inches, is the standard size for men's high school, college, and professional teams. This is the official size of the basketball used in the NBA, as well as in men's college and high school basketball leagues. The WNBA uses a size 6 basketball, which is slightly smaller with a circumference of 28.5 inches. For international play, the basketball size used for men's games is slightly bigger, with a circumference of 30.7 inches.
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What You'll Learn

The official size of a men's basketball used in the NBA
The NBA's official basketball is manufactured by Spalding, one of the best-selling basketball brands alongside Nike and Wilson. Spalding is the official ball provider for both the NBA and the WNBA, while Wilson is the ball provider for the NCAA and most youth leagues.
In the context of basketball sizes, the NBA ball is referred to as a Size 7 basketball. This is the standard size for men's basketball, with a circumference of 29.5 inches and a standard weight of 22 ounces. A Size 6 basketball, with a circumference of 28.5 inches and a weight of 20 ounces, is the standard for women's basketball associations, including the WNBA.
It is important to note that basketball sizes can vary depending on age, gender, and level of play. For example, boys in middle school or ages 12-14 typically use a smaller ball with a circumference of 28.5 inches. Additionally, the FIBA, which governs international play, uses a slightly larger ball for men, measuring 30.7 inches in circumference.
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The size of a men's basketball used in international leagues
The size of a basketball can depend on the age, gender, and level of play of the players. For men's basketball, the ball size is typically determined by the league and the player's age.
For men aged 15 and up, the official size of a basketball is 29.5 inches in circumference, weighing 22 ounces, and is known as a size 7 ball. This is the standard size used in men's professional basketball associations, such as the NBA, as well as in men's college and high school basketball leagues. This ball size is also used in the NCAA, where the ball must be inflated to a maximum weight of 22 ounces.
For international play, specifically in FIBA-governed leagues, the basketball used is called a Molten GL7 for men, which is slightly larger than the balls used in the NBA or NCAA. The Molten GL7 has a circumference of 30.7 inches and features two distinct colors. This size is also used in men's international basketball, with a weight of 22 ounces.
It is important to choose the right size basketball to prevent injury and ensure a positive playing experience. Using a ball that is too small can cause issues with skill development and performance, as the weight and trajectory of shots and passes will need to be adapted when using a larger, heavier ball.
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The size of a men's basketball for high school and college basketball
The size of a basketball depends on the age, gender, and level of play of the player. For men aged 15 and above, a size 7 basketball is used. Size 7 basketballs have a circumference of 29.5 inches and a weight of 22 ounces. This size is used in men's college and high school basketball leagues, as well as in professional associations like the NBA.
For boys in middle school or ages 12-14, a size 6 basketball is used. Size 6 basketballs have a circumference of 28.5 inches and a weight of 20 ounces. This size is also used by women and girls aged 12 and above, as well as in women's college and high school basketball leagues.
For boys and girls aged 9-11, a size 5 basketball is recommended. These basketballs have a circumference of 27.5 inches and are the most commonly used size in youth basketball leagues.
Younger children, aged 4-8, can use a basketball with a circumference between 22 and 24.5 inches, depending on their hand size. Size 5 basketballs, with a circumference of 27.5-27.75 inches, can also be used by this age group. Finally, for children aged 4 and under, a size 3 basketball is a novelty option for fun and to help them get familiar with the ball.
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The size of a men's basketball for ages 15 and up
The size of a basketball is important to ensure a great playing experience and to prevent injury. The size of the basketball will have a significant bearing on player performance, development, and enjoyment. It is also important to consider the playing environment when choosing a basketball.
For men aged 15 and up, the official size basketball is 29.5 inches in circumference, weighing 22 ounces, and needing to be inflated to a pressure of 7.5-8.5 PSI. This is the standard ball used in the NBA, as well as in men's college and high school basketball leagues. This size is also known as a size 7 basketball and is used by most men's professional basketball associations.
The size of the basketball used in the NBA is the same as that used in the NCAA (men's college basketball) and in high school basketball. The WNBA uses a slightly smaller ball, measuring 28.5 inches in circumference, which is the same size used in women's college and high school basketball. This size is also known as a size 6 basketball and is the official size for most women's professional basketball associations.
For international play, specifically FIBA, the basketball used is slightly bigger. The men's ball has a circumference of 30.7 inches, while the women's ball measures 29 inches.
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The weight of a men's basketball
The weight of a basketball depends on the player's age, gender, and level of play. Size 7 basketballs, which are used in men's professional basketball associations like the NBA, weigh 22 ounces with a circumference of 29.5 inches. This is also the standard size for men's college, high school, and travel basketball leagues. Size 6 basketballs, which are used in women's professional basketball associations like the WNBA, weigh 20 ounces and have a circumference of 28.5 inches.
In the NCAA, inflation requirements are given in weight, with the men's ball having a maximum weight of 22 ounces. The women's ball has a maximum weight of 20 ounces. For international play, specifically FIBA, the basketball used is called a Molten GL7 for men and a Molten GL6 for women. These basketballs are slightly bigger, with the men's ball having a circumference of 30.7 inches and the women's ball measuring 29 inches.
For boys in middle school (ages 12-14), a basketball with a circumference of 28.5 inches is recommended. For anyone, male or female, between the ages of 9 and 11, a ball size of 27.5 inches in circumference is recommended. This is the most common size for youth basketball leagues. Boys and girls between the ages of 4 and 8 can use a basketball with a circumference between 22 and 24.5 inches, depending on their hand size. A basketball's weight can also depend on its material. Indoor basketballs are typically made of full-grain leather, while outdoor basketballs are made of rubber.
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Frequently asked questions
The official size of a men's basketball in the NBA is 29.5 inches in circumference, also known as a size 7 basketball.
The standard weight of a men's basketball in the NBA is 22 ounces.
The size of a men's basketball in international play, specifically FIBA, is 30.7 inches in circumference, slightly larger than the NBA ball.
The ideal basketball size for men in high school is the same as the NBA size, 29.5 inches in circumference.
Men aged 15 and above should use a basketball with a circumference of 29.5 inches, which is the official size.











































