LOONBALLOON Princess Grad Graduation Accent your graduation themed party with this 19in. large unique shape Princess Grad Supershape foil mylar balloon. The perfect balloon for your graduation party, this 19in. party balloon is great for setting the scene! This balloon includes a self-sealing valve, preventing the gas from escaping after it’s inflated. The balloon can be inflated with helium to float or with a balloon air inflator. Balloon arrives uninflated. 19in. Princess Grad Supershape Balloon