According to google, a ping-pong ball weighs 2.7 grams (0.00595248 pounds) and is 1.57 inches in diameter.

Is a ping-pong ball heavy?

The official weight of a ping pong ball should be 2.7 grams. That being said a ball may weigh between 2.67 and 2.77 grams. The ITTF will sample 24 balls and the mean sample must be between 2.69 and 2.76 grams and no more than 1 ball out of 24 sampled may be outside of the acceptable range.

Do all ping pong balls weigh the same?

ITTF-approved table tennis balls must weigh 2.7g. But there's an accepted tolerance of between 2.67 and 2.77g. Lighter ping pong balls are slower and more likely to wobble, whereas heavier balls are faster and more stable in their trajectory.