Our 6 inch premium glow sticks are very bright and glow for a longer amount of time than our standard sticks do. Perfect for a glow in the dark party! They measure approximately 6 inches long by 1.5 cm in diameter, and they glow once for 8-12 hours. Each glow stick comes with a pre-attached hook, which can be used to hang the stick. To activate the item, simply snap and shake it. Bend and shake the stick to get the light on. Perfect for night event and festival.Special hook design.