These planters were made to match our home.  Each side panel was made with leftover tiles from various areas of the house.  Tiles from the sunroom floor, the fireplace wall, the hearth etc., and some with tongue and groove cedar.  Each of the panels are held in place on the planter with rare earth magnets.  As such, they are interchangeable and replaceable.  The size was made to support a drop in plastic planter to contain the soil, plants and any moisture.