Volleyball rules on the playing court
The FIVB official requirements for a regular volleyball court consist of a rectangular space, measuring 18 × 9 metres divided into two halves by a net. The height of the volleyball net will vary according to categories, age and gender. The volleyball court is thus divided into two 9 × 9-metre areas, each assigned to one of the teams. The three-meter line further divides the volleyball court into first-line and second-line, or attack zone and defence zone, this distinction will affect how some players may play during a rally.
The sidelines are part of the court, meaning that if the ball touches the ground on any of the three lines (side and service) the referee will call it in and a point will be scored! Volleyball rules contain no restriction on whether players can step outside the court during an action or not, they can chase a ball and save a point up to the moon, but there is one line they cannot cross and that is the centre line! In fact that line marks the area of the opponent's team.