Abstract: A method and a device for checking the dimensions of vehicles, preferably in connection with carrying out alignment work thereon. The method and the device use a reference frame (1) which is suspended from the chassis of the vehicle. Indicators (5, 12) are disposed at selected check points in the vehicle to indicate a possible deviation in position from a desired value at an individually selected check point on the vehicle, the nominal position of which is known and which is characteristic of the vehicle. The indicators comprise first indicator elements each in the form of a vertically adjustable lead rule (12) which is suspended in said check point or in points related thereto outside the vehicle, and second indicator elements in the form of horizontally adjustable reference pins (5). The distance between a selected reference point (12a) on the first indicator element and a selected reference point (5a) on the second indicator element constitutes a measure of the deviation sought.