This Happy Birthday foil balloon has an automatic sealing valve. This balloon comes with a card, with a message inside that reads, "It"s your birthday!". The card acts as a weight for the balloon and is attached with a piece of pink ribbon. This balloon will come flat and not inflated with either air or helium, you must inflate this balloon yourself. This balloon measures 18 Inches across. Ideal as a special gift to a someone on their birthday.