This planter comes in a set of two and both run 10 inches in diameter. The planters appear to look like heavy stone or concrete, but the material is actually a composite of recycled plastic and powdered stone. This make the planter lightweight, durable, and weather-resistant. The planter has pre-drilled drainage holes (with removable plugs) and a water reservoir at the base. Care should be taken to plug drainage holes if used inside. Hanging plants outside make having drainage holes a great option.