Orange felt balls bounce higher and move faster than the red felt or foam balls, but lower and slower than the green ball. They are a step toward the traditional yellow tennis ball while still remaining fun and manageable for players learning the game. Courts at this level are 60 feet by 21 feet for singles and 60 feet by 27 feet for doubles. The net is 3 feet at the center and 3-foot-6 at the net posts.