This document summarizes the key rules and aspects of football. It notes that football is played between 11 players on each side on a pitch measuring 90 to 120 meters long by 64 to 75 meters wide. It was created in England. The rules state that a foul results in a yellow or red card depending on severity, and two yellow cards equal a red card causing the player to be sent off. It lists the positions of the 5 referees during a game and provides examples of some top Spanish football teams, having been edited by Alvaro Cardona Marina.