Number Balloons: Package include number 6 balloon + Straw, You can buy other numbers to combine together to form any numbers | Number 6 Balloon: Great 6th birthday party decorations for boy or girl, or anniversary photography props | Large Number Balloons: It’s about 40 inch large, perfect big number balloon for your parties | Space Gradient Color, beautiful and shiny,number balloons are made of 100% aluminum foil, thick and non-toxic, premium quality and great price | 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, while it will not float when filled with air