Predicted distribution of the effective radius R_e shown as a function of the stellar mass M_* at redshifts z = 0.25, z = 1.51, and z = 2.25 (from left to right) for early-type (top row) and late-type galaxies (bottom row). The predictions are compared with the data from van der Wel et al. (2014; shaded areas). We also show the size-stellar mass relation measured at z = 0.1 by Bernardi et al. (2014) and Mowla et al. (2019) as dashed lines and dots, respectively.