Exotic BPBS460 Bean Pebbles, Black, 5 Pounds Pebble mulch in interior or exterior garden beds Use in Water features, Aquariums & ponds Perfect for walkways & Driveways. Bean pebble The unique stones can be used in a multitude of ways providing opportunities for creativity and exploration both indoors and outdoors Ideal for exposed aggregates, swimming pools, aquariums and many other uses Measures 8-inch length by 8-inch width by 18.5-inch height