Glow in the Dark Diamond Shaped Headband, Large Light Up Green Costume Headband for Halloween, Cosplay, Festivals, Parties and Night Out

【EYE-CATCHING DIAMOND SHAPED HEADBAND】: Stand out the moment you walk into the room. The oversized neon-green diamond shaped topper creates a bold, instantly recognizable look, turning a simple black headband into a playful statement piece for costumes, parties, cosplay, festivals and unforgettable nights out. | 【GLOW IN THE DARK AFTER LIGHT EXPOSURE】: Made with high-quality glow-in-the-dark material that absorbs light and releases a vivid green glow when the lights go down. Simply expose the diamond topper to sunlight, bright indoor light or a flashlight for about 3–5 minutes before use. Longer and stronger light exposure can help create a brighter glow in the dark. | 【LARGE TOPPER FOR MAXIMUM VISUAL IMPACT】: Designed to be noticed from across the room. The full headband measures approximately 6.7 in / 17 cm high and 2.8 in / 7 cm wide, while the oversized diamond topper measures about 4.9 in / 12.5 cm high and 2.2 in / 5.5 cm wide—large enough to make your costume instantly more fun and distinctive. | 【FLEXIBLE & SECURE FOR COMFORTABLE WEAR】: The lightweight black headband gently flexes to fit most adults, while the small inner grip teeth help keep it comfortably in place as you walk, dance, take photos or enjoy the party. A simple design that lets the glowing diamond take center stage without weighing down your look. | 【EASY TO ASSEMBLE, READY FOR EVERY OCCASION】: The diamond topper and headband feature a simple detachable assembly design, making setup quick and convenient before your event. Perfect for Halloween costumes, cosplay, costume parties, music festivals, themed events, night outs, photo booths and group celebrations—an easy way to add a brilliant green glow to any look.