This balloon has an automatic sealing valve. It can be filled with air so it can be fixed to the wall or can be filled with helium so that it floats. This balloon will make a great decoration for your Children's party. Or buy as a surprise gift for any occasion! Please note that this balloon will come flat and not inflated, you must inflate this balloon yourself. It measures approximately 26 inches (66cm). Available in numbers 1, 2, 3, 4 and 5.