The Ball
A regulation size volleyball has a circumference of approximately 25.6 to 26.4 inches (65 to 67 centimeters), and typically weighs between 9.2 to 9.9 ounces (260 to 280 grams).
Volleyballs are usually made of synthetic leather or composite leather. These materials are chosen for their durability and consistency in flight.
The inflation pressure of a volleyball is regulated. The pressure is measured in pounds per square inch (psi) and typically falls within the range of 4.3 to 4.6 psi (0.30 to 0.32 kg/cm²).
The Volleyball Court
- Court Dimensions: The Volleyball court is 60 feet by 30 feet in total. The net in placed in the center of the court, making each side of the net 30 feet by 30 feet.
- Center Line: A center line is marked at the center of the court dividing it equally into 30 feet squares, above which the net is placed.
- Attack Line: An attack line is marked 10 feet of each side of the center line.
- Service Line: A service line, the area from which the server may serve the volleyball, is marked 10 feet inside the right sideline on each back line.
The Net
Volleyball poles which support the net should be set at 36 feet apart, 3 feet further out from the sidelines. The net is placed directly above the center line, 7 feet 4 inches above the ground for women and 8 feet above the ground for men.