Just fill with water and get your game on! The Watermelon Ball® is designed to look, feel, and behave like a watermelon in water. Real watermelons are nearly neutrally buoyant: first sinking to the bottom then slowly rising to the top, making them ideal for all kinds of water games. Watermelon Ball® lets players dribble, kick, bounce, pass, and intercept under water. The extremely durable vinyl membrane stands up to intense action, features that are sorely missing from real watermelons. When filled size is 9″ (22.86 cm) dia and approximately 7.8 lbs (3.55 kg). Watermelon Ball® comes with hose adaptor, 2 filling needles, and instructions. Please review all warning labels and read instruction manual before using this toy. Meets all CPSIA, CCPSA, ASTM, and EN71 safety standards.