This 10-piece foil balloon set includes 2 large mermaid tail balloons (approx. 31" / 79 cm) and 8 seashell balloons (approx. 21" / 53 cm) in shimmering pastel colours. Made from durable foil (Mylar), the balloons can be inflated with helium or air and are suitable for birthdays, baby showers and under-the-sea themed parties. Ideal for creating a photo backdrop, entrance display or party decoration.