Experimental study of breakup of micro liquid jets using digital holographic microscopy (DHM) is described. Double-pulsed Nd:Yag lasers were used as light source for the DHM. When the micro liquid jets with 50 micron jet diameter were injected in still air, the double-pulsed holograms were recorded on a CCD sensor. The recorded holograms were numerically reconstructed for the measurement of the micro liquid jet properties. United States Air Force (USAF) resolution target was used for the spatial calibration of the reconstructed holograms. The measurement included the averaged liquid column diameters and the jet exit velocities for the different injection pressure.