Horizontal images are archivally matted 11 x 14, 16 x 20, and 22 x 28. Horizontal images can also be made into Canvas Gallery wraps. Canvas sizes available are 15×20, 24×32, 30×40, and our largest single panel size 36 x 50. We now offer making select horizontals into a triptych or 3 panel size. for example 3 panels each 18×34 for a total size 0f 58×34 inches. We also have a much larger tritptych size of 3 panels each 28×60 for a total size of 88×60 inches