BLUE NUMBER FOIL BALLOON. Fabulous 16 inch Metallic Number Foil Air Fill Balloon. Perfect for any party or occasion. These balloons are supplied flat with a straw to self-inflate them - so easy - and no helium required ! There are handy tabs for ease of hanging - or attach to a ballon stick and place anywhere you wish. Approx 16 inch Metallic Numbers come with self-sealing valves and can be re-used. Choose your numbers from the drop down menu.