Similar to Fig. 6. We show the predicted size evolution of spiral galaxies (two-armed on the left; three- and four-armed on the right). The symbols represent the observed location in size-redshift, and the lines point to the evolutionary endpoint, taken to be centered on the size-redshift relation for quiescent (early-type) galaxies. In all cases the adopted amplitude and pitch angle are the same and unchanging (A₂ = 0.3 and i_p = 20°). Essentially all galaxies reach a size typical of quiescent galaxies before z = 0.