An orangish surface with black ribs and a possible logo is the traditional color scheme of basketballs but they are sold in various colors. The surface of the ball is nearly always divided by "ribs" that are recessed below the surface of the ball in a variety of configurations and are generally a contrasting color. As in most inflatable balls, there is a small opening that allows the pressure to be increased or decreased. Nearly all basketballs have an inflatable inner rubber bladder, generally wrapped in layers of fiber and then covered with a surface made either from leather (traditional), rubber, or a synthetic composite. The ball is also used to perform tricks (sometimes called freestyling), the most common of which are spinning the ball on the tip of one's index finger, dribbling in complex patterns, rolling the ball over one's shoulder, or performing aerobatic maneuvers with the ball while executing a slam dunk, most notably in the context of a slam dunk contest. Therefore, the ball must be very durable and easy to hold on to. During the game, the ball must be bounced continuously ( dribbling), thrown through the air to other players ( passing) or thrown towards the basket ( shooting). Īside from the court and the baskets, the basketball is the only piece of equipment necessary to play the game of basketball.
High school and junior leagues normally use NCAA, NBA or WNBA sized balls. The standard for a basketball in the National Basketball Association (NBA) is 29.5 inches (75 cm) in circumference and for the Women's National Basketball Association (WNBA), a maximum circumference of 29 inches (74 cm). For example, a youth basketball could be 27 inches (69 cm) in circumference, while a National Collegiate Athletic Association (NCAA) men's ball would be a maximum of 30 inches (76 cm) and an NCAA women's ball would be a maximum of 29 inches (74 cm). Basketballs usually range in size from very small promotional items that are only a few inches (some centimeters) in diameter to extra large balls nearly 2 feet (60 cm) in diameter used in training exercises. A basketball is a spherical ball used in basketball games.
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