Quantity: 1 Accent your swan princess themed party with this 18" round Iridescent Pastel Swan foil mylar balloon. The perfect balloon for your swan princess party, this 18" Anagram 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.