This is a good quality jumbo foil balloon 31 . There is 1 foil balloon in a pack. The balloon needs helium to be inflated. It is automatic self sealing. The size is approximately 31 inch x 25 inch ( 78 cm x 63 cm ). This balloon is made in USA.WARNING: CHOKING HAZARD - Children under 9 years old can choke or suffocate on uninflated or broken balloons. Adult supervision is required. Keep uninflated balloons from children. Discard broken balloons at once.