This listing is for an order of air-filled, super-easy to inflate "Hello 30" letter balloons! 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 balloons are self-sealing and come with a straw for easy air inflation. Letters are approximately 16” tall. For other 30th birthday decor, shop here: https://www.etsy.com/ca/shop/CouronneBoutique?ref=listing-shop2-all-items-count&search_query=30th+birthday IMPORTANT - PLEASE READ: - Balloons ship flat and not inflated; these balloons are air-filled only and will not float with helium. - Please exercise caution when inserting the straws into the balloon to inflate; they are made of mylar (foil) and can rip easily if the straw is forcefully inserted. - Balloons are self-sealing; when removing the straw from the balloon, press the valve flat to seal.