Feature:Line a walkway， edge a flower bed or fill a planter with these unique Stone pebblesAfter being exposed to daylight， these pebbles Light (sky blue) in the darkLight lasts approximately two to three hours after full sun exposurePebbles are about the size of cooked lima beansSize: Length 1 inch ， Width: 0.5 inchColor : Blend ColorMaterial:Photoluminescent pigment + resinPackage include: 20pcs for a bag (100pcs for 5*20pcs)