Oshion Exercise Fitness Blue Yoga Balance Trainer ball W/ Resistance Bands & Pump Size: 23 Diameter x 10 Height,Weight Capacity: 660 lbs Two Elastic Strings Included Are Ideal For Keeping Balance. Multiple Uses For Balance, Core Stability, Endurance And Strength Trainings. Perfect For Fitness And Easy And Convenient For Carry. Enjoy a great workout at the comfort of your own home.