16-inch Aluminum Foil Letters (Before Inflation) - 13 Characters Dimensions: 16 inches pre-inflation / 13.5 inches post-inflation Quick, Convenient, Economical, and Safe - Easily inflate the lightweight Happy Birthday Balloon Banner at home. It can be strung together for a banner or affixed to a wall, ideal for both indoor and outdoor party settings. Each letter measures 16 inches in height and is crafted from sturdy Mylar material. Birthday Balloons Alphabet Balloons for Birthday Celebrations Ideal for embellishing Happy Birthday events 16-inch Foil Letter Balloons for birthdays Simple to adhere to walls or suspend against any backdrop Please note that the Happy Birthday banner balloons are not suitable for helium inflation due to their weight; they will not float. Inflate using the provided straw or balloon pump. WARNING: CHOKING HAZARD - Children under 8 years old may choke or suffocate on uninflated or broken balloons. Adult supervision is necessary. Keep uninflated balloons away from children. Dispose of broken balloons immediately. Package Includes: - 13 individual alphabet letters - Straw WARNING: CHOKING HAZARD - Children under 8 years old may choke or suffocate on uninflated or broken balloons. Adult supervision is necessary. Keep uninflated balloons away from children. Dispose of broken balloons immediately.