- Each pack includes 1 pcs of Rainbow Foil Balloon, 1 pc of Heart Shaped Happy Valentine's Day Balloon, 1 pc of Heart Shaped Love you Balloon. - Sizes are as follows: Rainbow balloon - 85 cm x 44cm, Heart Shaped Happy Valentine's Day Balloon and Heart-Shaped Love you Balloon is approx. 45 cm when inflated. - Can be filled with air or helium. We recommend a mixture of both for best results. Delivered Flat.