How Big Are Ping Pong Balls

How Big Are Ping Pong Balls

Last modified: September 26, 2023

How big are ping pong balls?

Ping pong balls, also known as table tennis balls, are small spherical objects that are a crucial component of the game. But have you ever wondered how big these balls actually are? Let’s dive into the dimensions and size of ping pong balls.

International Standards

According to the International Table Tennis Federation (ITTF), the official governing body of table tennis, the standard size for a ping pong ball is 40mm in diameter. This measurement is for both the celluloid and plastic balls used in international competitions.

Variations in Size

While 40mm is the standard size, it’s worth noting that there can be slight variations in the actual size of ping pong balls. Due to manufacturing processes and manufacturing tolerances, some balls may have a diameter slightly smaller or larger than 40mm.

Additionally, there are also variations in the size of ping pong balls used in recreational play or for training purposes. These balls may be larger or smaller than the standard 40mm diameter, depending on the specific needs or preferences of the players.

Old vs. New

In the past, the ITTF used to approve and regulate celluloid balls, which were slightly larger than the current standard. Celluloid balls had a diameter of 38mm, but in 2000, they were replaced by the 40mm plastic balls. The change was made to slow down the game and enhance visibility for players and spectators.

It’s important to note that while celluloid balls may still be used in casual play or non-ITTF-sanctioned events, most official competitions and professional leagues now exclusively use the 40mm plastic balls.


Ping pong balls might seem small, but their size is regulated to ensure fair play and consistent gameplay. The standard size for these balls is 40mm in diameter according to the ITTF. However, it’s not uncommon to find slight variations in size due to manufacturing processes. Whether you’re playing for fun or competing at a professional level, understanding the dimensions of ping pong balls adds to your overall knowledge of the sport.

Additional Ping-Pong Resources:
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