Larger than expected, but also exceeded expectations as to performance. They change the game, obviously, but they make it a lot of fun, particularly for less experienced players. For those with experience, can still have fun with it. Surprising bounce. Dog prefers it due to hardly any sound.
First of all, if you are looking for Olympic grade table tennis balls these are not them. They are a great solution to when you need a quiet game. Also, I have a 4yo son and these are easier for him to hit and practice for the real thing.