Exercise Balls Are Sold According To Height
Some Manufacturers Offer Weight Capacity Guidelines
Use this chart, to take the guesswork out of buying the correct size exercise ball.
5’7″ or shorter use a 55-centimeter ball.
5’7″ to 6’4″ use a 65-centimeter ball.
Taller than 6’4″ use a 75-centimeter ball.
Inflate the ball so that it’s firm. When you sit on it, your knees and hips should form a 90 degree angle.