Laws of the Game
A goal must be placed on the centre of each goal line.
A goal consists of two vertical posts equidistant from the corner flagposts and joined at the top by a horizontal crossbar. The goalposts and crossbar must be made of approved material. They must be square, rectangular, round, elliptical or a combination of these shapes and must not be dangerous.
The distance between the inside of the posts is 12.5 cm (0.13 yds) and the distance from the lower edge of the crossbar to the ground is 4 cm (0.13 ft).
The position of the goalposts in relation to the goal line must be in accordance with the graphics.
The goalposts and the crossbar must be white and have the same width and depth, which must not exceed 6 mm (0.23 ins).
If the crossbar becomes displaced or broken, play is stopped until it has been repaired or replaced in position. Play is restarted with a dropped ball. If it can not be repaired the match must be abandoned. A rope or any flexible or dangerous material may not replace the crossbar.
Nets may be attached to the goals and the ground behind the goal; they must be properly supported and must not interfere with the goalkeeper.
Goals (including portable goals) must be firmly secured to the ground.