The goal posts in AFL are 6.4 meters apart
No they wern't.
NFL goal posts are 10 feet high and 18.5 feet wide.
The goal posts in the NFL and college are 18 feet, 6 inches apart. In high school, goal posts are 23 feet, 6 inches apart.
NFL goal posts are 10 feet high and 18 feet, 6 inches wide
In the NFL and NCAA, goal posts are 6 inches wide. High school football fields usually use goal posts that are 4 inches wide.
Most posts are set at the standard 10' from high school to the pros.