Well they only turn 1 once! This balloon is a first birthday party must have! Inflate with air using the tube provided. *Not suitable for helium 66 x 37 cm (26 x 14.5"). One air-filled, super-easy to inflate "one" balloon in script font! Lightweight and perfect to display on walls or tables, inside or out, this set includes string and built-in tabs to make hanging a breeze. The balloon is self-sealing and comes with a straw for easy air inflation. Note: balloon ships flat and not inflated. This balloon is air-filled only and will not float with helium.