Large Mermaid & Fish Large Helium Balloon Whether it\'s a big birthday, you\'re saying \'congrats\', or another fabulous occasion in between, send them a surprise with one of our balloons. Our helium balloons arrive by post ready-inflated all 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 38 inch helium balloon 3 x ribbons 1 x weight