Joke Collection Website - Bulletin headlines - What is the size of the rainbow gate? How big should the banner be?

What is the size of the rainbow gate? How big should the banner be?

Rainbow inflatable arches are generally 6 meters, 8 meters, 1 meters, 12 meters, 15 meters, 18 meters, 2 meters, 25 meters and 3 meters, and the diameter of each arch is not the same. For example, a 12-meter arch is generally 9CM in diameter, and the banner should be about 45CM. The arch is a semicircle, and the 12-meter arch.