6x10
6x10 is a common measurement used to describe the dimensions of various objects, most notably lumber and photographic prints. In the context of lumber, it refers to a board that is nominally 6 inches wide and 10 feet long. The actual dimensions of finished lumber are typically smaller than the nominal measurements due to the milling process. For example, a 6x10 piece of lumber might actually measure closer to 5.5 inches in width after planing.
In photography, 6x10 refers to a large format film size, measuring 6 inches by 10 inches. This