A football is a ball inflated with air that is used to play one of the various sports known as football. In these games, with … See more

Law 2 of the game specifies that the ball is an air-filled sphere with a circumference of 68–70 cm (27–28 in), a weight of 410–450 g (14–16 oz), inflated to a pressure of 0.6 to 1.1 atmospheres (60–111 kPa or 8.7–16.1 psi) "at sea leve… See more

In the United States and Canada, the term football usually refers to a ball made of cow hide leather, which is required in professional and collegiate football. Footballs used in recreation and in organized y… See more

The football used in Australian football is similar to a rugby ball but generally slightly smaller and more rounded at the ends, but more elongated in overall appearance, being longer by comparison with its width than a rugb… See more

The game is played with a round leather football made of 18 stitched leather panels, similar in appearance to a traditional volleyball (but larger), with a circumference of 68–70 cm (27–28 in), weighing between 480–500 g … See more

Until 1870, rugby was played with a near spherical ball with an inner-tube made of a pig's bladder. In 1870 Richard Lindon and Bernardo Solano started making balls for Rugby school out of hand stitched, four-panel, leath… See more