Packaging includes: 1 purple number 4 balloons + 1 small rose gold crown balloon + 1 straw + 1 piece glue point - Paste the crown balloon onto the number balloons. Size: The number balloon is about 40 inches, crown balloon about 11 inches，and the balloon with the crown is unique and beautiful, perfect for your party decoration. Material: The balloon is made of high-quality aluminum film nylon, which is not easy to burst and leak, bright color, safe and reliable. Material: The balloon is made of high-quality aluminum film nylon, which is not easy to burst and leak, bright color, safe and reliable. Easy to use: You can use a straw or pump to inflate a number balloon with helium or air, number foil balloons can float with helium, crown balloons cannot float，while it will not float when filled with air. After-sales service: If you have any quality problems, please contact us, free replacement or refund, please rest assured to buy! Inflation Tip: Inflate with a straw or a hand pump, which can be filled with air or helium; full of helium can fly into the sky. in order to prevent bursting, please do not inflate the balloon too much, preferably about 90%.