What Size Basketball Does the NBA Use? Size 7 Explained

By Emma Wilson · May 27, 2028

The NBA uses a Size 7 basketball, which has a circumference of 29.5 inches (74.9 cm) and is designed for male players aged 12 and older, including professionals.

Overview of Basketball Sizes in the NBA

The official game ball used in the National Basketball Association (NBA) is standardized to ensure consistency in play, performance, and player experience. This size is also adopted by other professional men's leagues worldwide.

Key Features of the NBA Basketball

Size: Size 7
Circumference: 29.5 inches (74.9 cm)
Weight: Approximately 22 ounces (624 grams)
Material: Genuine leather (game use), composite leather (recreational)
Brand: Wilson (official supplier since 2021)

Comparison Across Leagues and Age Groups

Different leagues and age groups use varying ball sizes to accommodate physical development and skill level. Understanding these differences helps players choose the right equipment.

Basketball Size	Circumference (inches)	Circumference (cm)	Weight (oz)	Weight (g)	Intended Users
Size 7	29.5	74.9	22	624	NBA, Men 12+
Size 6	28.5	72.4	20	567	WNBA, Women 12+, Boys 9–11
Size 5	27.5	69.9	17	482	Boys and Girls 7–8
Size 4	25.5	64.8	14	397	Children 5–8
Mini (Size 3)	22	55.9	10	283	Toddlers, Skill Development

Table data source:1, 2

The data shows a clear progression in ball size and weight relative to age and gender, ensuring age-appropriate handling and skill development. The NBA’s Size 7 ball is the largest standard size used in competitive play, reflecting the physical demands of professional men’s basketball.

History of the NBA Game Ball

The NBA has used various brands over the decades. From 1983 to 2021, Spalding was the official supplier. Since the 2021–2022 season, Wilson has resumed its role as the official basketball provider after previously holding the contract before 1983.

Why Wilson?

Improved grip technology
Consistent feel across indoor courts
Microfiber composite options for durability
Partnership aligns with NBA’s global growth strategy

Frequently Asked Questions About NBA Basketball Size

What size basketball does the NBA use?

The NBA uses a Size 7 basketball with a 29.5-inch circumference and weighs 22 ounces. This is the standard for all professional men’s games.

Is the NBA ball bigger than college or high school balls?

No, the NCAA men’s basketball is also a Size 7 with identical specifications (29.5 inches, 22 oz), so it is the same size as the NBA ball.

Why do women’s leagues use a smaller ball?

The WNBA uses a Size 6 ball (28.5 inches) to accommodate average hand size and shooting mechanics in elite female players, improving control and performance.

Can I use an NBA-sized ball for youth training?

For boys under 12, a smaller size (Size 5 or 6) is recommended. Using a Size 7 too early may hinder skill development due to reduced control and shooting form.

Does the NBA basketball size affect shooting accuracy?

Yes, consistent ball size ensures predictable handling, grip, and flight dynamics. Players train extensively with the official ball to optimize muscle memory and shot accuracy.