Official ping pong rules state that the table surface must be 9 feet by 5 feet and sit 2 feet, 6 inches off of the ground. A net divides the table and runs parallel to the table's end lines, dividing the table into two courts. The plastic ball must weigh 2.7 grams, have a diameter of 40 millimeters and be matte white or matte orange.
The rackets can be any size, shape and weight but must have a flat and rigid rubber surface. The racket must be composed of at least 85% wood. Each player must show the umpire and the other player his racket at the beginning of the match, as well as his new racket if he changes rackets during the match.
Service of the ball begins when it leaves the server's open palm and ends when it touches anything other than the table, net or rackets. The server must begin by projecting the ball upwards at least 16 centimeters from his palm. The ball then must touch the table surface, be struck by the server's racket, and pass over the net to the other player's court. As long as the serve qualifies as a good serve, the other player must send the ball over the net, back into the server's court.
The opponent scores points if a serve is bad. The server scores points if an opponent fails to make a good ball return, returns the ball past the end line of the table, or strikes the ball more than once, or if the ball touches anything other than the playing surface of the racket.
The game ends when a player reaches 11 points. If the players tie at 10 points, then the winner must win by two points.