Bigood 16" Gold Number 0-9 Birthday Wedding Party Decoration Foil Balloons 1 You can choose your own with a meaningful combination of numbers,size is 16 inch This beautiful balloons is great for children's birthdays party or wedding party Material is aluminum film, color uniform, spherical beautiful This foil balloon is helium quality and suitable to inflate with both helium or air This balloons is self sealing so no tying with fingers required,doesn't have a bicycle pump, with the usual straws can blow the balloon