Our 1.5 inch mini glow sticks make great decorative items and are perfect for creating a glow in the dark centerpiece. They also make perfect fishing floats for night fishing! Measuring approximately 1.5 inches long and 4.5 mm in diameter, they glow 1 time, for 6-8 hours. When you"re ready to use the item, snap it and then shake it. Sold by the box (50 glow sticks per box).