Stability Ball Sizes

The GMF Store offers the 2 most commonly used sizes for ball training. Both are made of extra durable plastic and are rated to support up to 400 pounds according to the manufacturer specifications.

The general recommended size to height for stability ball selection is as follows:

55 cm. ball	21 inches	4' 11" -  5' 4" tall
65 cm. ball	25 inches	5' 5" to 5' 11" tall

The standard method for determining proper ball size is by sitting on the ball. For most exercise applications, there should be a 90 degree angle at both the hip and knee joints and your thighs should be parallel with the floor when seated on the ball.

If you are an experienced exerciser and under 5'4", you should choose the 55 cm ball which will provide less contact surface and require more stabilization work.

If you are new to stability ball exercise and border between the two sizes, you may opt to choose the larger ball which will provide more stability. Less air will provide more support and more air will increase size and decrease the surface contact with the ball

Or you may want to think about starting your stability program with the new contour ball. This peanut shaped physioroll provides forward and back movement only and is lower to the ground.

Stability Balls & Kits