Abstract: A measuring gauge apparatus includes a elongate sheath containing a longitudinally aligned cavity therewithin slidably receiving a ruler formed with gradations upon its upper surface. The ruler further includes a series of threaded apertures aligned with each gradation. A notch is directed through the forward end of the ruler. Each of the apertures is mounted for receiving a fluid reservoir containing a marking fluid therewithin including a threaded hollow marking shaft coaxially arranged through a bottom surface of the reservoir and including a lid and strap to secure the reservoir to the ruler for marking of an underlying work piece.