by The official table tennis ball size is 40 mm in diameter, with a standard weight of 2.7 grams. This is the ball size used in modern competitive play under International Table Tennis Federation (ITTF) rules. Recreational balls may look similar but can vary in quality, roundness, bounce and durability.
What is the official table tennis ball size?
A regulation table tennis ball must meet these basic specifications:
- Diameter: 40 mm
- Weight: 2.7 grams
- Shape: Spherical and sufficiently round
- Colour: White or orange, with a matte finish
- Material: Modern balls are made from plastic rather than the older celluloid material
The 40 mm measurement refers to the ball’s diameter across its widest point. A ball that is visibly misshapen, cracked or badly dented will not perform consistently, even if it is nominally the correct size.
Why did table tennis balls change from 38 mm to 40 mm?
Older competition balls had a diameter of 38 mm. The switch to the larger 40 mm table tennis ball was made to slow the game slightly and make rallies easier to follow. The larger ball creates more air resistance, so it generally travels a little more slowly and produces a slightly different response to spin.
You may still see 38 mm balls in old equipment collections, casual games or online listings. They are not the current standard for official competition. If you are replacing balls for club play, choose 40 mm balls instead of products labelled only as “old size” or “38 mm.”
What do 1-star, 2-star and 3-star balls mean?
Star ratings usually describe manufacturing consistency and playing quality rather than the physical diameter. Most products marketed for table tennis use are still close to the standard 40 mm size.
- 1-star balls: Suitable for casual practice, schools and recreational games. They may have less consistent roundness or bounce.
- 2-star balls: A better option for regular training and club practice.
- 3-star balls: Designed to offer the most consistent shape, bounce and durability. These are the preferred choice for serious training and competition.
An ITTF-approved competition ball is a stronger choice when you need equipment for organised tournaments. Check the packaging for current approval information rather than relying on the star rating alone.
Plastic table tennis balls versus celluloid balls
Modern table tennis balls are made from plastic. Celluloid balls were widely used in the past, but plastic became the standard for safety, production and equipment-regulation reasons.
Both types can be labelled 40 mm, but their feel, sound and bounce may differ. Plastic balls can also be marked “poly,” “ABS” or “seamless,” depending on their construction. For a consistent experience, use the same ball type throughout a training session, especially when practising serves, receives and spin.
How to choose a table tennis ball in Nigeria
For casual home play, a durable 1-star or 2-star 40 mm ball is usually sufficient. Players who train regularly should consider 3-star plastic balls because their more consistent bounce makes technical practice more reliable. Competitive players should select an approved ball that matches the rules of their tournament or table tennis association.
Heat, storage conditions and rough surfaces can shorten a ball’s life. Keep balls away from direct sunlight and excessive heat, and replace any ball that has a crack, flat spot or noticeable change in bounce. When comparing prices in Nigeria, check the number of balls in the pack, the material, the size marking and the quality rating rather than comparing the price alone.
Common questions about table tennis ball dimensions
Is a table tennis ball 40 mm or 38 mm?
The current official size is 40 mm. The 38 mm ball was the older standard and is no longer the normal choice for modern competition.
How much does a table tennis ball weigh?
A regulation ball weighs 2.7 grams. Small differences can occur between products, but a ball intended for official play should meet the applicable equipment requirements.
Are ping pong balls and table tennis balls the same size?
In everyday use, “ping pong ball” and “table tennis ball” usually refer to the same type of ball. For organised play, look for a 40 mm plastic ball with suitable quality or approval markings.
Can I use practice balls in a tournament?
Only if they meet the tournament’s equipment requirements. For competitive matches, use the ball specified or approved by the event organiser.
