The "Sempertex 30cm Age 21 Crystal Clear Latex Balloons, 6pk" are perfect for celebrating a 21st birthday with style. Each pack includes 6 high-quality latex balloons, each measuring 30cm (12 inches) in diameter. These balloons feature a crystal-clear design, adding a touch of elegance to your decorations for this milestone birthday. Suitable for both air and helium inflation, they offer versatile decorating options. Whether used alone or as part of a larger birthday arrangement, these balloons will enhance your party decor and contribute to a memorable celebration of turning 21.