18"-22" diameter, 21" height -Birdbaths made from impressive granite boulders blend naturally into any landscape. -The basins of our Boulder Birdbaths have a smooth ground finish with a polished rim and a natural edge. -Highly durable granite is virtually indestructible.  Use year-round with a Birdbath Heater Add a Layered Waterfall Bubbler or Floating Solar Bubbler to move the water and attract more birds.