How big is the French dress skirt?

About 3.5 meters

There are big swing skirts and straight skirts. If it is a big skirt, it needs about 3.5 meters, which is more beautiful. If it is a straight dress, the skirt is 1.5 to 1.8 meters, and there is an A-line skirt, which is about 2.5 to 3 meters.