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A finger goniometer is a tool used to measure the range of motion (ROM) of finger joints and other small joints, such as toes. Here are some common features of finger goniometers: HeadThe head of a finger goniometer has opposing scales that typically range from 180° to 30° in 5° increments. ArmThe arm of a finger goniometer has a linear scale that measures in inches and centimeters. MaterialFinger goniometers can be made from stainless steel or plastic. Plastic goniometers are often opaque black with white markings. SizeFinger goniometers can vary in size, with some being as small as 3.5 inches. Other methods for measuring finger ROM include: Visual estimationPhotographic goniometryDiagrammatic recordingsGoniometric glovesRadiographic imaging