Made of Foam Board: Our large prom decorations 2025 are made of high-quality foam board, which is lightweight yet sturdy. You can move graduation decor anywhere, suitable for indoor and outdoor prom parties. Advance Assembly: Our PROM light up letters consist of four letters, and it's recommended to assemble marquee letters 5 days ahead of time to ensure your party goes smoothly. Prepare A Hot Glue Gun Yourself: You will need to prepare a hot glue gun in advance to glue these large letters. Perfect Prom Photo Backdrop: These 4ft marquee light up letters serve as the ideal backdrop for your party, adding a unique visual element to your graduation party. Worry-free After-sales: If you have any questions about the prom letters, our customer service will provide you with a satisfied solution within 8 hours.