Decorate your loved one's birthday with this Cubez UltraShape Balloons Happy Birthday! Shaped Balloon 38cm x 38cm. The perfect balloon for that special birthday party, this Anagram balloon is ideal for starting a celebration to remember!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.