In using your height in determining the right exercise ball sizes, the equipment should be level or slightly above the knees. The best way to size up the exercise ball is by sitting on it. When doing this, bend your knees at a 90-degrees angle, and your thighs shoud be level with the floor. Find out your height and check which size you should try first.

The following simple chart will help you to find the right exercise ball size depending on your height.

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Sitting position is the best positition to check if the new ball is for  appropriate height. At an angle of 90-degrees, compared to your knees your hips are level or slightly higher. When the exercise ball is too small, you might compromise the position of your hips and pelvis when sitting on it. On the other hand, a ball that is too large will not provide opportunities for your feet to touch the ground, putting you in an unstable position. that is why it is important to achieve the right ball in order to have the right workout.

There is another way to determint the right exervise ball size is to calculate the length of your arms. Since the length of your leg may vary from that of other people, the arm span can accurately measure the right ball for you.

If the exercise ball will be used for several aerobic exercises and need to hold onto it, the arms cam also provide a better fit for your situaation. However, using this methhod might be a bit difficult (and require more time) as most people usually have more knowledge of their height than their arm span.

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If you prefer arm span to determine the right exercise ball for you, this chart will help you find the correct size.