FIFA lays out in its Laws of the Game handbook for soccer the required size, shape and material of soccer goals to ensure safety and fairness. US Youth Soccer recommends regulation-size goals beginning at Under-14 teams; younger players can use goals 6 feet by 18 feet or even smaller if they are really young.
Goals must be 8 yards wide and 8 feet tall. The width of the actual goalposts and crossbar must be no larger than 5 inches. FIFA does not regulate the depth of the net; it only requires that netting not interfere with the goalie. The goalposts and crossbar can be square, rectangular or elliptical in shape, as long as they line up exactly with the goal line.