Physical half-light radius r_e as a function of the stellar mass M_*. Black empty circles show the Hα sample, and blue markers show SF galaxies (in both cases we show sources for which it was possible to measure both variables). The green square shows the outlier of the MZR. The blue dashed line represents the linear fit in a form y = a + bx to the Hα sample with a = −1.41 ± 0.73 and b = 0.19 ± 0.09. The green dot-dashed line shows the linear fit from Ichikawa et al. (2012) with the logarithmic slope of 0.115. The red dot-dashed line shows the linear fit found by van der Wel et al. (2014) with a slope of 0.25. The green and red shaded regions represent the dispersion of the linear fit as estimated by Ichikawa et al. (2012) and van der Wel et al. (2014), respectively, while the blue shaded region shows the dispersion of our measurement estimated as the median absolute deviation of 0.2.