Abstract: A dimensional gauging apparatus has a blade bearing generally flat and parallel gauging surfaces which establish the gauge thickness and are positioned within an adjustable clearance gap in a gauging operation. The blade is shaped or provided with a dead weight to cause the gauge when captured between two objects forming the gap to move or topple as the gap is opened to the gauge thickness. At least one of the parallel surfaces establishing the gauge thickness may be situated within a recess which captures the blade between the two objects. Multiple pairs of parallel surfaces may be provided on one blade member for setting gaps of different sizes.