Batman symbol foil balloon 30″. There is 1 foil balloon in a pack. The balloon needs helium to be inflated. It is automatic self sealing.There is 2 sides printing.The size is approximately 30 inch x 17 inch ( 76 cm x 43 cm ).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.