Exotic Pebbles PBS1030 Polished Pebble, Black, 5 Pounds, 1/2-Inch to 1-Inch Pebble mulch in interior or exterior garden beds Use in Water features, Aquariums & ponds Perfect for walkways & Driveways. Polished pebbles Use indoors or outdoors Available in gold color Measures 3/8-inch gravel