Top, middle, and bottom panels show the redshift evolution of the average (rest-frame) equivalent widths of Hα, [O iii]λ5007, and [O ii] λ3727, respectively, for galaxies with stellar masses 9.5 < log (M_⋆/M_⊙) < 10 as fitted by Khostovan et al. (2016), and the range of the EWs observed in our five z ~ 0.3 Lyman continuum leakers (blue horizontal bands). The leakers from our study show line equivalent widths typical of star-forming galaxies at z ≳ 6.