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How to Choose the Size of a Gymnastics Ball?

What size to choose?
The general rule is that when you sit on a gymnastics ball, your knees should be a bit lower than your pelvis. You should sit on the ball with your back and spine straight and pelvis firmly pressed to the ball. This means your knees should be bent at an angle wider than 90°.

The height of the gymnastics ball can of course be adjusted by how much you inflate it. However, it is best if you follow this table:

Gymnastics Ball Size Table

Your height in cmBall Ø in cm
under 150 45
150 - 165 55
165 - 175 65
175 - 185 75
185 - 195 85
195 + 95
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