What about the size of tennis court with net post distance for doubles?

A standard tennis court for doubles measures 36 feet wide and 78 feet long. The net posts are positioned 3 feet outside the doubles sidelines, resulting in a distance of 21 feet from the center of the court to each net post. The height of the net is 3 feet at the center and 3.5 feet at the posts. This configuration ensures that the court accommodates the larger playing area required for doubles matches.