As of 2015, rules by the International Volleyball Federation require six players on the court during indoor volleyball play. The ball must have a circumference of 25 1/2 to 27 inches and a weight of 9 to 10 ounces.
The net height varies by age group and sex. For males, net heights range from 7 feet for under-12 competition to 7 feet, 11 5/8 inches for matches involving 15- to 18-year-old teams to men under age 55. The height for females range from 6 feet, 6 inches for under-10 play to 7 feet, 4 1/8 inches for matches of 13- to 18-year-olds to women under age 45.
The court is 59 feet long and 29 feet, 6 inches wide with a 2-inch boundary surrounding the court. An attack zone, 9 feet, 10 inches from the center line, also is part of the court.
In International Volleyball Federation beach volleyball, two players are on the sand court, which measures 52 feet, 6 inches long and 26 feet, 3 inches wide. The net height is the same as in the indoor game.
In indoor and beach matches, which use a best-of-3 or best-of-5 game format, teams are permitted to contact the ball three times, including on blocks, as they return the ball over the net.