Here’s an arch with 34″ foil numbers embosed for a 21st Birthday party. To make sure the structure would support the numbers I decided against helium and used the aeropole system. I attached the numbers using 2 x 260q Black modelling balloons. I wanted the digits to face slightly downwards into the centre of the room and I thought this would be difficult to achieve . In the end it was fairly easy, I slotted 1 end of the aeropole in and when holding the 2nd side I was able to twist the poles until the numbers rotated into the required position then I simply slotted the 2nd side in and they were set.
21st Arch