Canvases are available in small, medium, and large canvases. The small canvases are usually 4 x 8 inches (10.16 x 20.32 centimeters) and 5 x 7 inches (12.7 x 17.78 centimeters). Medium canvases start at 8 x 10 inches (20.32 x 25.2 centimeters) and go up to 12 x 16 inches (30.48 x 40.64 centimeters), which large which is anything from 18 x 24 inches (45.72 x 60.96 centimeters) to 36 x 48 inches (91.44 x 121.92 centimeters).