Happy 21st! Welcome your friend or loved one to adulthood with this 21st Sparkling Holographic Multi Foil Balloon. The balloon features the number 21 with a holographic finish and an attractive border of multi coloured holographic dots and stars on a black background. Item Includes: Balloon. Fit and Sizing: Balloon measures 91.5cm / 36in. Please note: Requires helium to float but can also be air-filled.