Stability Ball

It depends on height. Under 5'0": 45cm. 5'0" to 5'5": 55cm. 5'5" to 5'11": 65cm. 5'11" to 6'4": 75cm. 6'4" and above: 85cm or 95cm. When properly inflated and seated on the ball, knees should sit at roughly a 90-degree angle.

Yes, a foot pump is included in every box.

It means the ball is designed to deflate slowly and in a controlled way if punctured, rather than popping suddenly. It is not puncture-proof and should still be kept away from sharp objects and rough surfaces.

Yes. Many people use a stability ball as a desk chair alternative to engage the core and improve posture during long sitting sessions. The 65cm size works well at a standard desk height for most adults.

Stability balls are commonly used as birthing balls for comfort and movement during pregnancy. A healthcare provider should be consulted for guidance on safe use.

Firmer gives more stability for seated use and general exercise. Softer increases the instability challenge for more advanced training. Do not inflate past the recommended diameter for the chosen size.

Wipe it down with a damp cloth after use. Avoid harsh chemical cleaners. Store away from direct sunlight and sharp objects.

The ball is built from heavy-duty thickened PVC rated for regular adult use. For high-intensity use, firmer inflation and a larger size (75cm or above) are recommended.

Orders are processed within 1–2 business days, and delivery typically arrives in 7–10 business days. Tracking information is provided once your order ships so you can follow its progress every step of the way.

Please read our Shipping Policy for more information.

Every TENAX product is backed by a 30-day return policy, giving the opportunity to try it and ensure it meets expectations. If it doesn’t feel like the right fit, returns are available within 30 days of delivery in accordance with the return guidelines.