13"-17" diameter, 18" height Also available in larger size here -Birdbaths made from impressive granite boulders blend naturally into any landscape. -We've chosen thousand-year-old granite boulders for these pieces to highlight the stone's rich color and texture. -Inside the basin you'll discover an added surprise---two hand-carved granite koi fish. -Highly durable granite is virtually indestructible.  Use year-round with a Birdbath Heater -Made of two pieces.  No two of these birdbaths are exactly the same. Add a Layered Waterfall Bubbler or Floating Solar Bubbler to move the water and attract more birds.