Bright Pink Happy Birthday Mum Balloon Surprise her to more with one of our happy birthday balloons. Our helium balloons arrive by post ready-inflated with a long string and plastic circle balloon weight. Send balloon delivery for next-day arrival and we also have special Saturday courier service available. Included with our balloon delivery: 1 x 18" helium balloon 1 x ribbon 1 x weight Additional Information Inflated with helium, and delivered by courier in one of our signature boxes, our self-sealing foil balloons are filled to last! That's why we guarantee five days of floating high or we'll replace them at no extra cost.