| | BasketballBalls| Balls Article | A basketball is an inflated spherical ball used in the game of basketball. Basketballs typically range in size from very small promotional items possibly only a few inches in diameter to extra large balls nearly a foot in diameter used in training exercises to increase the skill of players.Nearly all basketballs have an inflatable inner rubber bladder, generally wrapped in layers of fiber and then covered with a tacky surface made either from leather (traditional), rubber, or a synthetic composite. As in most inflatable balls, there is a small opening to allow the pressure to be increased or decreased. 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. A standard 29.5 inch basketball has about 4118 pebbles, with the pebbles being at a diameter of 2.5 millimeters. An orange surface with black ribs and a possible logo is the traditional color scheme of basketballs but they are sold in various colors. Balls are generally designated for indoor (generally made of leather or absorbent composites), or all-surface use (generally made of rubber or durable composites, also known as Indoor/Outdoor balls). The abrasiveness of asphalt and the dirt and moisture generally present in an outdoor setting will usually ruin an indoor ball within a very short period of time.
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