The FitBALL BalanceDisc easily adjusts for you challenge level. Used while standing, kneeling or sitting, the FitBALL BalanceDisc improves balance and joint stabilization and strengthens and tones core muscles. It has a higher side profile and longer tactile points than our FitBALL SeatingDisc. Air pressure adjusts easily with the FitBALL Pump needle attachment, sold separately. When inflated; will measure 14" in diameter. Blue color. Packaged in a poly bag.