The international rules specify that the game is played with a sphere having a mass of 2.7 grams (0.095 oz) and a diameter of 40 millimetres (1.57 in). The rules say that the ball shall bounce up 24–26 cm (9.4–10.2 in) when dropped from a height of 30.5 cm (12.0 in) onto a standard steel block thereby having a coefficient of restitution of 0.89 to 0.92. The ball is made of celluloid plastic as of 2015, colored white or orange, with a matte finish. The choice of ball color is made according to the table color and its surroundings. For example, a white ball is easier to see on a green or blue table than it is on a grey table. Manufacturers often indicate the quality of the ball with a star rating system, usually from one to three, three being the highest grade. As this system is not standard across manufacturers, the only way a ball may be used in official competition is upon ITTF approval.
Equipments of Table Tennis
Ball
![40_mm_table_tennis_balls](https://olympicdreamindia.com/wp-content/uploads/2019/12/40_mm_table_tennis_balls.jpg)
Table
![Table_Tennis_Table_Blue](https://olympicdreamindia.com/wp-content/uploads/2019/12/Table_Tennis_Table_Blue.png)
The table is 2.74 m (9.0 ft) long, 1.525 m (5.0 ft) wide, and 76 cm (2.5 ft) high with any continuous material so long as the table yields a uniform bounce of about 23 cm (9.1 in) when a standard ball is dropped onto it from a height of 30 cm (11.8 in), or about 77%The table or playing surface is uniformly dark coloured and matte, divided into two halves by a net at 15.25 cm (6.0 in) in height. The ITTF approves only wooden tables or their derivates. Concrete tables with a steel net or a solid concrete partition are sometimes available in outside public spaces, such as parks.
Paddle/racket
Players are equipped with a laminated wooden racket covered with rubber on one or two sides depending on the grip of the player.
The wooden portion of the racket, often referred to as the “blade”, commonly features anywhere between one and seven plies of wood, though cork, glass fiber, carbon fiber, aluminum fiber, and Kevlar are sometimes used. According to the ITTF regulations, at least 85% of the blade by thickness shall be of natural wood. The average size of the blade is about 17 centimetres (6.7 in) long and 15 centimetres (5.9 in) wide. .