Body Shape Wellness Balls Professional grade anti-burst exercise balls are the highest quality ball available and are guaranteed to meet and exceed your expectations. ?Made from durable professional grade latex free PVC material ?2000 lbs. static load limit ?Anti-burst tested: Can hold 600 lbs with a 2cm cut while only slowly deflating ?Durable enough for any crossfit, pilates, workout or yoga routine you follow ?Dependable for every day use as an exercise ball office chair ?Non-slip ridges and easy cleaning surface Sizing Chart Based On Height Shorter than 5' 6": 55cm From 5' 6" - 5' 11": 65cm From 6' 0" - 6' 4": 75cm Instruction: Note: When you pump the ball, please take care. Any question, please feel free to contact us. Step 1: Put Plug into foot pump. Step 2: Pump the Ball to 55cm,65cm,75cm or it is firm to the touch. Step 3: Plug ball securely to prevent air leaks. Warranty policy: Every purchase is backed with a 100% Satisfaction Guarantee. If you are not thrilled, simply contact our reliable customer service team and know you will receive unmatched personal assistance.