Rules of the Game: For FIFA matches, the ball should have a circumference of not more than 70 cm (28 ins) and not less than 68 cm (27 ins).
Goalkeeper is the only position to be explicitly part of the rules of the game since they were codified in the 19th century.
The African Cup of Nations, the main international football competition in Africa, was first held in 1957.
American Bert Patenaude scored the first hat trick in World Cup history in a 3-0 victory over Paraguay in 1930.
Manchester City has the largest pitch of any club in the English Premier League: 116 x 77 yards.