Structural parameters, R_eff − n (left) and R_eff − b/a (right), for different populations of z ∼ 4 galaxies. Blue and grey circles represent the massive star-forming and quiescent galaxies, respectively, from the ZFOURGE and CANDELS surveys (Table 1 of Straatman et al. 2015). Coloured stars display the mean values for each one of the morphologically-classified groups of CEERS galaxies (Table 1 of Kartaltepe et al. 2023). The red squares are the values for GN20 and their sizes include their associated errors.