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Regulation size and weight for a football is a circumference of 68–70 cm (27–28 in) and a weight of 410–450 g (14–16 oz). The ball is inflated to a pressure of 0.6–1.1 bars (8.7–16.0 psi) at sea level. [20] This is known as "Size 5". Smaller balls, Sizes 1, 3, and 4, are also produced for younger players or as training tools. [20]
The football used in rugby league is known as "international size" or "size 5" and is approximately 27 cm (11 in) long and 60 cm (24 in) in circumference at its widest point. Smaller-sized balls are used for junior versions of the game, such as "Mini" and "Mod". A full size ball weighs between 383 and 440 g (13.5 and 15.5 oz).
The sizes of individual American and Canadian footballs can vary within specified size limitations. Despite the CFL and NFL having different specifications until 2018, they overlapped to a sufficient degree that from at least 1985 forward, the same ball could fall within the requirements of both leagues. [citation needed]
A football field as seen from behind one end zone. The tall, yellow goal posts mark where the ball must pass for a successful field goal or extra point. The large, rectangular area marked with the team name is the end zone. Football games are played on a rectangular field that measures 120 yards (110 m) long and 53 + 1 ⁄ 3 yards (48.
The following is a list of stadiums in the United States. They are ranked by capacity, which is the maximum number of spectators the stadium can normally accommodate. All U.S. stadiums with a current capacity of 10,000 or more are included in the list.
A football pitch or soccer field is the playing surface for the game of association football. Its dimensions and markings are defined by Law 1 of the Laws of the Game , "The Field of Play". [ 1 ] The pitch is typically made of natural turf or artificial turf , although amateur and recreational teams often play on dirt fields.
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