Zno's unit of measurement is INCH.
The product sizes listed across our website are all in inches. For example, a 5x7 Layflat Photo Book means the Layflat Photo Book is a landscape book 5 inches high and 7 inches across. The first number listed is always the height of the spine in our photobook. So if the photobook size is 11x8, it means a portrait book 11 inches high and 8 inches across.
It is the same for all other products like 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.