Letter balloon's size: 16inch , Heart balloon's size: 18inch , material: Aluminium foil, each set comes with OPP bag Purpose: scenes of decorative product promotion, store celebration, Atmosphere conciliator for student dance parties, birthday, open-air parties, Valentine's Day, New Year, Christmas, etc. Package only contains balloons and balloon accessories , not include other props in the picture Note: After the balloon is blown, the color will become lighter. The color of the object may be di