at http://www.hud.gov/offices/reac/pdf/pass_dict2.3.pdf (325 Pages, 343 KB) Additional clarification to these definitions is contained in the REAC PASS Compilation Bulletin which can be found at http://www.hud.gov/offices/reac/pdf/pass_bulletin.pdf (24 Pages, 275 KB)
An official NFL football is slightly larger than high school or other professional leagues. The length should measure about 11 inches from tip to tip, and the in circumference at the center of the football should measure about 22 inches.imilar to other levels of football, the NFL uses an egg-shaped football, but the NFL has specific rules to the size, shape and materials used for the football. The Digest of Rules of the NFL explains the official size requirements for the football, along with other basic rules for playing the game.
Football is a game of inches played on a field measured in yards -- English measurements are used to track movements on the field. Teams succeed based on how many yards they accumulate or allow. An official NFL football field is a rectangle that is 120 yards (110 m) long and 53 yards, 1 foot (49 m) wide. Most fields are covered in grass and set in an outdoor (open-air) stadium. Some fields are made of artificial turf, which you'll find in many of the indoor stadiums. 1.