Enlightens any environment with its fun and spunky attitude, while putting a bounce in the step of ordinary. Designed with an anti-burst ball that is covered in mesh so your seating experience can come alive. Allows a little zip in your sit by providing movement that not only helps you sit comfortably, but also helps you concentrate. Supports better posture and balance. Inspiring cover color is accented with four, powder-coated legs and stationary glides. Comes with a pump to help you inflate to a better state of mind. Has a zest for seating that will help you find your center, and an aura that says "Be One With Your Seat". Diameter: 17 1/2".