Upper and lower measurement limits of ENLR sizes as a function of luminosity distance (redshift) for different commonly used IFU. Here we assume the following observing modes for the IFUs: Wide-field mode for MUSE, 2-slit mode for GMOS, 8″ × 8″ for the PMAS lens array, and the 27″ diameter MaNGA IFU head. We defined the upper limit as the maximum distance to the corners from the center and the lower limit depends on the sampling and seeing which we set to 04, 03, 05, and 10 for MUSE, GMOS, PMAS, MaNGA respectively. The redshift distribution of CARS is highlighted as the red shaded histogram.