The Spalding TF-500 Performance Composite Indoor/Outdoor Basketball is a high-quality ball designed for basketball enthusiasts looking to play on both indoor and outdoor surfaces. Made with durable composite leather, this 28.5" ball in vibrant orange color is perfect for recreational games. The Spalding brand is well-known for producing reliable sporting goods, making this model a popular choice for athletes seeking performance and durability in their basketball experience. 28.5" (Size 6) Basketballs Women, girls ages 12+, and boys ages 12-14 use basketballs that measure 28.5" in circumference and weigh 20 ounces. 28.5" basketballs are also referred to as "intermediate" or "size 6" balls. Women's leagues including the WNBA, college and high school use 28.5" basketballs. Girls in 12+ leagues and middle school boys (ages 12-14) also use 28.5" basketballs.