A standard men's basketball weighs between 20 and 22 ounces, and a standard women's basketball weighs between 18 and 20 ounces. Smaller basketballs used by young children can weigh between 10.5 and 16 ounces.
The standard men's basketball is referred to as a "size 7" and is used by the NBA and by the male divisions of the NCAA and in high schools. The women's standard is known as a "size 6" and is used by the WNBA and by the female divisions of the NCAA and in high schools. A junior basketball, or size 6, is used by boys and girls between the ages of 8 and 12. Meanwhile, a mini basketball, or size 3, is used by children between 5 and 8 years old.