Celebrate in style with this set of five 17-inch Happy Birthday mylar balloons. These vibrant, eye-catching balloons feature classic birthday messaging and are perfect for parties, events, and special occasions. Mylar construction ensures durability and long-lasting helium retention compared to latex alternatives. Easy to inflate and arrange, they add festive flair to any birthday setup. Ideal for decorating venues, photo backdrops, or gift presentations. Each balloon measures 17 inches when fully inflated.