High-quality foil number balloons, perfect for birthdays, anniversaries and New Years Eve parties. Each balloon measures 40" (102cm) - please note there may be slight size variations between numbers. The metallic balloons are made from premium-grade foil which is thick and uniformly coloured. Available in a range of beautiful vibrant colours to suit any occasion. Balloons will arrive uninflated and will need to be inflated using air (reusable inflation tube to blow through included). Insert the reusable inflation tube into the plastic valve at the bottom of the number and slowly blow to inflate. When the balloon is sufficiently inflated, pull out the reusable inflation tube and pinch the self-sealing plastic valve - balloons will stay inflated for days. After the party, please use plastic reusable inflation tubes to export the air for reuse. These balloons are great for birthday parties, weddings, baby showers, outdoor parties, home parties, celebrations and other on-site decorations. It is a great birthday party decoration for babies, kids, and adults. Neel Blue 40 Inch Foil Balloon Number 4 Balloon Self-Inflating Balloon for Party Decor in Gold