The goal structure consists of a horizontal crossbar suspended 10 feet (3.0 m) above the ground, with two vertical goalposts 18 feet 6 inches (5.64 m) apart extending vertically from each end of the crossbar. In American football the goals are centered on each end line; in Canadian football the goals are centered on each goal line.
how wide are the goal post in the nfl
18 feet 6 inches (5.64 m) apart