The ball used in the Green stage has a higher compression than the Red and Orange stages (75% of a yellow tennis ball) and children play on a full-size court. Green players may be older children who are new to tennis or players of a good standard who have progressed through the Blue, Red and Orange stages. Court size: 10.97 m × 23.78 m (full court) Tennis ball: green ball (75% compression) Recommended racquet size: 25–27 inches