Size of a ping-pong ball Official competition table tennis balls have a diameter of 40 mm (1.57 inch). The majority of the balls on the market are this regular tournament size, however there are also 38mm (1.5 inch) balls for sale, such as these Franklin Sports 38mm table tennis balls.
The number on the side of a tournament ball refers to the circumference of the ball in millimeters. For example, a 50 ball has a circumference of 50 mm (1.97 inches), and a 100 ball has a circumference of 100 mm (3.94 inches). There are also 130- and 150-ball sets with corresponding numbers of strokes per game.
Table tennis balls come in many colors other than white. These include black, red, blue, green, brown, yellow, gray, and pink. All of these balls are made by QUIKRETE and are suitable for use with the table tennis game.
Ping pong balls are available in several different sizes. The most common sizes are 30 mm and 42 mm. Some manufacturers make their own sizes too, such as 16 mm and 20 mm. If you have never bought ping pong balls before, start with 30 mm balls because they are easy to find and cheap. As you get more confident, buy more expensive 42 mm balls or even 48 mm balls if you can afford them.
Pause, repeat after me: The official table ping pong ball's substance has changed throughout time, from celluloid to polymer, and its size has increased from 1.5" (38 mm) to 1.57". (40 mm). Table Tennis Balls have a diameter of 1.57" (40 mm) and a circumference of 4.94". (125.6 mm). A Ping-Pong ball has a mass of 0.05 oz (1.4 g).
The table tennis ball was originally made from cowhide which naturally contains small irregular holes or pores. When stretched into a ball, these holes tend to close up, so that when the ball is rolled on a surface it can't be felt by the player. The leather is then soaked in a solution of linseed oil and sand to make it soft and pliable. This process leaves the ball with an oily surface that prevents it from sticking to your skin when you hit it.
There are two types of ping pong balls: regulation and novelty. Regulation balls are white in color with a black dot in the center. They must meet specifications regarding weight, size, and material composition to be legal for play. Novelty balls are any other color than white or black and do not have to comply with any regulations but cannot be reused after being played with rubber paddles. They are popular among children who want to imitate the look of professional balls but can't afford to buy them yet.
Novelty ping pong balls come in many sizes and shapes.
1.5 inch ping pong ball size 1.75-inch golf ball size Tennis ball diameter: 2.5 in. "Baseball dimensions: 2.75 inches." - Source: http://sportsdictionary.com/ which-is-bigger-golf-balls-or-ping-pong.html
Golf balls are usually between 1 and 1½ inches in diameter, while tennis balls are typically about 2 inches in diameter. Ping pong balls are usually 1¼ to 1½ inches in diameter.
So golf balls are generally larger than tennis balls, which are in turn usually larger than ping pong balls.
The difference in size results from the different uses for each ball. Golf balls are designed to travel a long distance, so they must be durable yet feel light on the hand. Tennis balls are smaller and lighter, but they must be flexible enough to wrap around a racket handle. Ping pong balls are only 1¼ to 1½ inches in diameter, but they can be 3 inches or more in length; thus they require a cushioning material inside the container to prevent damage to the ball itself.