These prints are available in 8 x 12,  12 x 18, 16 x 24, 20 x 30 and 24 x 36 (with a couple of exceptions).  Click on this link for a second wild horse gallery with prints available in 8 x 10, 11 x 14, 16 x 20, 20 x 24 and 24 x 30  - 

Wild Horse Gallery II   <---