Happy birthday latex balloons pack of 6. 
Size: 11 inches (27cm) once inflated.
Suitable for helium or air inflation.
Easy to inflate using a balloon pump.
Long float times, perfect for filling it up with helium. 
Helium charges (£2.00 each last 8-12 hours or with Hi-Float £3.00 each for lifetime to 2-4 days)