Fuzzy Felt Tennis Balls have a lightweight versatile design making them great for introducing tennis to elementary age students as well as a wide variety of elementary catching, throwing and striking activities. Traditional felt covers provide an authentic tennis ball look and feel. Large 6" diameter (Compare to 2.5" for a regular tennis ball) creates more air resistance which slows their flight making them easier to hit, see and catch. Each Fuzzy Felt Tennis ball is inflated just like a playground ball or basketball, giving you control over how lively they bounce. Use with a tennis racket or pickle ball racket. Sold in a 6 color set of 6.