Just a quick note about kids squash balls. These are meant for beginner / improving players, often come in bright colors, and can be larger and much bouncier than regular squash balls.
Black Knight EZ Squash Ball
These are called EZ Squash balls and Black Knight makes them.
They are about as large as a tennis ball, and very spongy and bouncy. They’re meant for junior players just learning the game. They’re easier to hit than regular rubber squash balls, and you don’t have to warm them up. I’ve actually hit with these a few times and they’re surprisingly fun to play with. You can give them a good whack and have decent rally with them.
Here’s a video review I put together:
Dunlop Beginner Balls
Dunlop also has some balls for juniors. It’s a bit difficult to figure out the details on these balls but here’s what I think is going on.
This red one is larger than a regular squash ball and meant for the smallest children:
I believe the orange one is for improving players, and is smaller than the red Dunlop ball, but still a little larger than a regular squash ball.
And finally the green version — I think it’s the same size as a regular squash ball, just in a green color.
Karakal Big Ball
The Karakal Big Ball are squash training balls designed for coaches and perfect for instant warm-up. They are 15% oversized when compared to standard training balls.