Evolution of the disk size. Top panel: theoretical centrifugal disk radii. Bottom two panels: radii obtained from PRODIMO synthetic observations . The gas and dust radii for the models are calculated via synthetic ¹²CO and Band 6 continuum emissions with 90% flux threshold. The vertical, dashed gray lines mark the average Class 0/I and Class I/II boundaries. The shaded regions on the right depict half-violin plots of gas (red) and dust (red) radii of the Class II disks, as observed in a subset of ALMA surveys (see Table B.1).