All product sizes are listed in inches.
For example, a 6x8 Layflat Photo Book means the Layflat Photo Book is a landscape book 6 inches high and 8 inches across. The first number listed is always the height of the spine. If the photobook is 11x8, it is a portrait book 11 inches high and 8 inches across.
This applies to all our products, including Wall Art. A 16x20 canvas is a landscape canvas 16 inches in height and 20 inches across. A 20x16 canvas is a portrait canvas that is 20 inches in height and 16 inches across.