Do a simple search on the internet for exercise ball and you'll run across many types from which to choose.
But how do you decide which one is right for you?
There are two things to keep in mind before purchasing an exercise ball.
The first thing to pay attention to is the size of the ball you are purchasing. You want to make sure you buy the correct size ball.
The second thing to pay attention to is the quality of the ball. I only recommend purchasing balls that are anti-burst or burst resistant. These balls are made from a higher quality plastic than regular exercise balls.
What size ball should you buy?
That depends on your height.
If you are 4' 11" - 5' 3", you should use a 55 cm. exercise ball.
If you are 5' 4" - 5' 10", you should use a 65 cm. exercise ball.
If you are 5' 11" and up, you should use a 75 cm. exercise ball.
If you are need of an exercise ball, I recommend you purchase a ball by Valeo. They are quality balls and are burst resistant. Plus, they come with a hand pump and a poster of basic exercises. There is not a better value than these balls.