Pokemon Centerpiece Balloon Inflate with Air 24 Tall. It is automatic self sealing. The size is approximately 24 inch x 18 inch ( 61 cm x 45 cm ) . NO HELIUM REQUIRED. It is good for table decorations. Straw included.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.