Celebrating an age or a year, every Birthday or Anniversary party needs our giant foil number balloons. Use alone or mix and match with colourful shaped balloons to make your own unique party decoration. Inflated Height: 34 inches or 86 cm Inflated Width: 26 inches or 66 cm Self Sealing. Can be filled with Air or Helium. SuperShape Number Foil Balloon for milestone birthdays. ** Please note that the balloon does not come inflated. Helium needs to be filled to keep it floating in air. ** Once inflated balloon will last 3-4 days fully inflated.