Some of the rules established by Beers were the size of, and the use of a rubber lacrosse ball, that the lacrosse stick could be any length, but the pocket needed to be flat in the absence of a ball, length of the field to 200 yards , size of the goal and goal crease, twelve members of a team on the field at a time, and the length of a match to first to reach five goals, or lead by three.