The Anagram Colorful & Creepy Halloween foil balloon measures 18" and features a vibrant multicolor round design that’s perfect for spooky celebrations. Made from durable mylar/foil with a self-sealing valve to prevent gas from escaping, it can be filled with helium for floating or air for decorating. Measuring 5.91" x 3.94" x 3.94", this festive balloon adds a creepy yet fun touch to Halloween parties or haunted house décor. One balloon per package, ships uninflated.