There are 15 balloons in the package. Balloons 30 cm. It can swell up to its diameter. Flying balloons can be made by filling them with helium gas. When helium gas is added, it can stay in the air for approximately 6-8 hours. You can extend the time it stays in the air with a special gel. By choosing a balloon stand, you can use it with different colored balloons next to the table or on the table. You can obtain the Balloon Stand from our store. You can decorate it as you wish by choosing a balloon chain. You can obtain the Balloon Chain Apparatus from our store. You can inflate it quickly with the help of a balloon pump. You can take a look at our balloon inflation hand pumps in our store. By choosing balloon sticks, you can distribute balloons to guests at birthdays or other celebrations. Made from natural latex material. Balloons pass all tests at European standards.