They’re like bumper cars for your body! For small-group or large-class play, use Belly Bumpers to run races, play adapted “bumping” ball games, or just let off steam. Made of heavy-duty 4 mm vinyl with reinforced seams and handles. Inflate with pump. Ages 13-Adult. SIZE: 53" diameter - inside diameter is 18". Also available in child size ages 5-12: #FG8563. Contains one belly bumper.