ETG evolution in stellar mass, effective radius, and effective velocity dispersion, due to major, minor, and standard mini mergers. Same as Fig. 1, but with the addition of the potential contribution from z = 3 to z = 0 of standard mini dry mergers (red arrows), that is mergers with ξ ≪ 1 in which R_e and σ_e vary with stellar mass as R_e ∝ M_⋆² and σ_e ∝ M_⋆^−1/2, respectively. These power laws are the limits of Eqs. (4) and (5) for ξ → 0 (independent of β_R, provided β_R < 1). While the stellar mass growth attributed to major and minor mergers (black arrows) is based on observational estimates (Sect. 2.3), the stellar mass growth attributed to mini mergers (red arrows) is chosen ad hoc so that in the upper panel the head of the red arrow lies on the observed z = 0 R_e-M_⋆ correlation.