High Bounce Wobble Cushion 14in Diameter, Balance Disc, Pump Included This exercise balance cushion / wobble cushion, is an inflatable round cushion which is strong enough to stand or sit on While sitting or standing on the cushion you will have to constantly balance yourself which will help keep your muscles active. The cushion is both good for kids and adults. It includes a pump The Wobble Cushion has a 14" Diameter