< b >Q: Why is my yoga ball smaller than expected?< /b >< br > A: Please refer to the inflation instructions. After the initial inflation, let the ball sit undisturbed for 48 hours, and then inflate it again to achieve the desired size. This process allows the material to adjust and the ball to expand fully.< br > < b >Q: What does it mean that the fitness ball is ANTI-BURST?< /b >< br > A: Anti-burst means that when the fitness ball is subjected to weight, even if pierced by a sharp object around the size of 1*4mm, it will slowly deflate instead of bursting suddenly. This design is intended to prevent injuries during use. All Trideer yoga balls undergo thorough limit load tests before leaving the factory, ensuring they can withstand weights of up to 330 lbs.< br > < b >Q: How do I choose the right size for a yoga ball?< /b >< br > A: To select the appropriate size for a yoga ball, consider your height. Trideer offers a variety of options. Generally, the Small (S) size is suitable for individuals below 4\'5, the Medium (M) size for heights between 4\'5\'\'-5\'1\'\', the Large (L) size for those between 5\'1\'\'-5\'9, and the Extra Large (XL) size for heights between 5\'9\'\'-6\'3\'\'. The XL size is suitable for individuals 6\'3\'\' and above. Choosing the right size ensures proper alignment and effectiveness during exercises.< br >