This International Standard specifies the nominal sizes and aim dimensions, with their cutting tolerances, of black-and-white and colour photographic papers in sheets (negative-positive or reversal processes) for pictorial use. It also specifies a method for checking the squareness of the sheets and straightness of their edges, and establishes a rule for package marking. The term"pictorial" means use in amateur, commercial and portrait photography, and excludes specific uses such as documentary reproduction, photocomposition or graphic arts. In this International Standard, metric units are prime.