What Size and Type of Ball do I Need?
Choosing the right ball to sit on is very important. If it is too small or too large, your legs won't rest at the right angle for good posture, and the ball might even be too unstable to sit safely. Your thighs should be level or sloping slightly downward when you're on the ball.
Getting the right size is easy. Balls come in four basic sizes, and your height determines which size you need. Here's the breakdown:
The three main types of ball seat include the basic ball, the ball mounted on a stable stand, and the ball chair. The mounted versions are more stable and perhaps safer in an office environment, but they don't exercise your back muscles as much, and are considerably more expensive.
The mounted versions typically come with a standard ball size, and can be adjusted to the proper height.
Choosing the right ball to sit on is very important. If it is too small or too large, your legs won't rest at the right angle for good posture, and the ball might even be too unstable to sit safely. Your thighs should be level or sloping slightly downward when you're on the ball.
Getting the right size is easy. Balls come in four basic sizes, and your height determines which size you need. Here's the breakdown:
| your height | ball diameter |
| under 4'8" (under 143 cm) | 45 cm |
| 4'8" to 5'4" (143 cm to 163 cm) | 55 cm |
| 5'4" to 6'0" (163 cm to 183 cm) | 65 cm |
| 6'0" to 6'7" (183 cm to 201 cm) | 75 cm |
The three main types of ball seat include the basic ball, the ball mounted on a stable stand, and the ball chair. The mounted versions are more stable and perhaps safer in an office environment, but they don't exercise your back muscles as much, and are considerably more expensive.
The mounted versions typically come with a standard ball size, and can be adjusted to the proper height.
The Basic Ball
Comes in different sizes for different people. Sells for about $15-$25.
The Ball Chair
More back support & stability. Sells for about $75-$115.