At each goal line is a set of forty-foot (12.2 m) high goalposts, which consist of two
uprights joined by a crossbar 18.5 feet (5.6 m) long which is ten feet (3.1 m) above the goal line. The goalposts may be H-shaped (both posts fixed in the ground) although in the higher-caliber competitions the tuning-fork design (supported by a single curved post behind the goal line, so that each post starts ten feet (3.1 m) above the ground) is preferred. The sides of the field are marked by white sidelines, the goal line is marked in white, and white lines are drawn laterally across the field every 5 yards (4.6 m) from the goal line.