This Dolphin foil Balloon measures 37 inches x 22 inches and is made of mylar. The Dolphin Mylar Balloon sure to be a hit as he floats in the air. Printed on both sides. Note: Balloon arrives uninflated. WARNING: CHOKING HAZARD - Children under 8 years can choke or suffocate on uninflated or broken balloons. Adult supervision required. Keep uninflated balloons from children. Discard broken balloons at once.