What are standard photo booth strip dimensions?

Standard analog photo booth strips produced by classic machines adhere to rigorous physical formats established during the mid-20th century. American Auto-Photo machines (Models 11 through 21) produce 4-pose vertical strips measuring exactly 2 inches by 8 inches (51 x 203 mm). European Photomaton and Photo-Me cabinets typically output narrower 1.5-inch strips (38-40 mm wide). Each photograph on the strip is exposed on continuous direct-positive silver-halide roll paper and severed by an internal guillotine blade upon exit.