Rules of the Game: Any of the other players may change places with the goalkeeper provided that the referee is informed before the change is made and the change is made during a stoppage in the match.
Rules of the Game: For international matches the field of play must have dimensions of: Length: minimum 100 m (110 yds), maximum 110 m (120 yds); Width: minimum 64 m (70 yds), maximum 75 m (80 yds).
Goalkeeper is the only position to be explicitly part of the rules of the game since they were codified in the 19th century.
The mascot for the 1990 FIFA World Cup in Italy was a green, white and red stick figure with a soccer ball head named Ciao.
On a regulation size field, the edge of the penalty box is 18 yards from the goal line.