I make planters in three general sizes. The smallest are approximately twelve inches wide and tall measured on the outside, the medium 15" x 15" and the large are 18" x 18".  Larger sizes are available on a custom basis.  All have two drainage holes in the bottom of the pot and are suitable for use both indoors and outside in moderate climates. 

The 12" size fit nicely on most steps and are the perfect size for growing herbs on your deck or patio. 

The pieces shown here are just a few of the many sizes and color combinations I currently have available.