What is the weight of a table tennis ball?

Answer 1

http://www.cnenigeria.com/sports/tabletennis.htm

The table is 9 ft by 5 ft (2.74 m by 1.52 m) with its upper surface 30 in. (76 cm) above the floor. The table is divided into opposing courts by a net 6 in. (15.24 cm) high and a white stripe, running lengthwise down the center, that is used only for doubles play. The surface of a standard table is made of 3/4-in. (1.91-cm) five-ply wood, the resiliency of which is such that a standard table tennis ball, when dropped from a height of 1 ft (30.5 cm), will rebound to a height of from 8H to 9H in. (22.2 to 24.8 cm). The white celluloid ball is hollow; it is about 1.5 in. (3.81 cm) in diameter and about 0.88 oz (2.5 g) in weight. The rackets may be any shape but usually are oval and made of wood, faced with rubber or sponge that may be pimpled or smooth.

Answer 2

It is the International Table Tennis Federation (that is ITTF) which constitutes the governing body dealing with all national table tennis associations. The older 38 mm table tennis balls as of the year 2000 were officially substituted by 40 mm balls. This is now the standard. It is to have 2.7 grams mass in total. At the same time, 2.67 to 2.77 grams is deemed acceptable. In the same way diameters of 39.5 mm to 40.50 mm may be used. It was toward the closing stages of the year 2000 that the ITTF brought in several rules changes including the change in ball size. These changes instituted were ultimately meant to lead table tennis to being more workable as a televised spectator sport. The increased ball size meant increased air resistance, thus slowing down the game.

Answer 3

The conventional 38 millimetre diameter ball is 2.5 grams in weight.

The current adopted 40 millimetre diameter ball that is 2.7 grams in weight.