The futnet ball is similar to which ball in size?

Footballtennis, also known as futnet is a sport originating in the 1920s in Czechoslovakia. It is a ball game that can be played indoors or outdoors in a court divided by a low net with two opposing teams (one, two or three players) who try to score a point hitting the ball with any part of their body except for the hands and making it bounce in the opponent's area in a way that makes it difficult or impossible for the other team to return it over the net.

In all the disciplines, a set finishes with 11th point with a two-point difference, maximum score is 15:14. To win a match, the team has to win 2 sets. The height of the net is 1.10 m. The players may not touch the net during the game, otherwise, it is a point for the opponent.

The futnet ball is similar to a football in size but is glued, made of 32 panels, of synthetic (natural) leather and when properly inflated, should bounce more than half a meter.