Size Guideline for Ball Chairs for Active Sitting
The size of the ball is determined by a person's height, leg length and weight.
Size Guideline below provides an approximate guideline for choosing the correct ball size.
Remember - When sitting on the ball:
-Sit on the top of the highest point of the ball, , do not lean against the ball
-Hips slightly higher than knees
-Feet should be flat on the floor, shoulder width apart
| Person's Height |
Ball size |
| 32-38 inches |
30cm |
| 39-51 inches |
45cm |
| 52-63 [5'3]inches |
55cm |
| 5'4" to 6'0" |
65cm |
| 6'0" to 6'7" |
75cm |
Final size adjustments are made by inflation/deflation to get the individuals proper knee/hip relationship when sitting on the ball.