Jumbo 9 3/8 Inch Tennis Balls - Extra Large Dog Training Balls, Durable Outdoor Sports Equipment for Pets & Tennis Practice - Perfect for Fetch Games, Canine Exercise & Court Training

The perfect place to keep signatures of your favorite players, the 9 3/8" Tennis Ball is made of the same rubber and felt as a traditional tennis ball, but on a much grander scale. At 9 3/8 inches in diameter, you get around 10 times the area for signatures compared to a standard tennis ball.