Fitness Ball Sizing Choose the best Fitness Ball size for you based on your height. When seated on the ball, hips and knees should be parallel to the floor (or hips slightly higher – never lower – than knees). You may need a larger ball if your legs are proportionally long for your height. If in doubt, buy the larger ball. If necessary, adjust the ball diameter by inflating it to less than maximum size.
Size chart: Your Height / Ball Size (max. height/diameter) 4’8″ to 5’3″ 55cm (21 in.) 5’3″ to 6’0″ 65cm (25 in.) - purchase 65cm Exercise Ball 6’0″ to 6’7″ 75cm (29 in.)
Do not use Fitness Ball with other Exercise equipment.
