[stockresearcher]

The International Tennis Federation has 7 different ball specifications (maybe 8 depending on how you count), each to be used for specific purposes/conditions. Of those, there are 5 different ball sizes. And then you’ve got all those various novelty balls that are not intended for actually playing tennis.

[jorzel]

Do you know exact size of any of these balls? When you do envelope calculations in software you never know precise values. But still these calculations can be useful.

[stockresearcher]

Pages 5 and 6. Of course, it is a range for each size, not an exact measurement.

https://www.itftennis.com/media/14104/2025-technical-booklet...