The ball used in football consists of an inflated rubber bladder encased in a leather or rubber cover. The ball is an extended spheroid, and regarding size, it has a circumference of 28.5 in (72.4 cm) around the long axis and 21.25 in (54 cm) around the short axis. It weighs between 14 and 15 oz (397 and 425 g).
A regulation NFL football is 11 inches (28 cm) long and about 28 inches (71 cm) in circumference at its widest point. The CFL ball is slightly larger than the ball used in NFL.
These rubber balls are nylon wound with extremely durable and tacky rubber covers making them easy to catch and throw even for the beginner player.
The Playing Field
The regulation NFL football field is 120 yards long (360 feet or 110 meters) and 160 feet wide (49 meters or 53 yards & 1 foot). At both ends of the 120-yard dimension, white lines called goal lines mark off the entrances to the end zones. Each team defends one end zone. A team must carry, pass, or kick the ball into the 10-yd (9-m) end zone on the opponents' half of the field to score. A game of football is divided into four periods, known as quarters, each consisting of 15 minutes of playing time.
The regulation CFL field is 110 yards long and has 20 yard end zones.
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