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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).
A football field is often used as a comparative measurement of length when talking about distances that may be hard to comprehend when stated in terms of standard units. An American football field is usually understood to be 100 yards (91 m) long, though it is technically 120 yards (110 m) when including the two 10 yd (9.1 m) long end zones.
105 meters – length of football pitch (UEFA stadium categories 3 and 4) 105 meters – length of a typical football field; 109.73 meters – total length of an American football field (120 yards, including the end zones) 110–150 meters – the width of an Australian football field; 135–185 meters – the length of an Australian football field
The two goal lines are between 50 and 100 yards (46 and 91 metres) wide and have to be of the same length. [3] The two touchlines are between 100 and 130 yards (91 and 119 metres) long and have to be of the same length. [3] All lines on the ground are equally wide, not to exceed 12 centimetres (5 inches). [3]
While several American stadia could accommodate the extra 17 + 1 ⁄ 2 feet (5 + 5 ⁄ 6 yd or 5.3 m) per side in width (multipurpose stadia, baseball parks converted for football, and some soccer-specific stadiums are particularly good fits), most American stadia would lose between 15 and 18 rows of seating in each end zone because the field ...
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Within the penalty area is another smaller rectangular area called the goal area (colloquially the "six-yard box"), which is delimited by two lines starting on the goal-line 6 yd (5.5 m) from the goalposts and extending 6 yd (5.5 m) into the pitch from the goal-line, and the line joining these. Goal kicks and any free kick by the defending team ...