Another interesting feature of ionic microgels is the microgel deswelling with increasing microgel concentration, for dilute suspensions. This effect is explored in simulations by changing simulation box size. In Fig. , we observe how the swelling ratio relative to microgel size at the dilutest concentration varies by increasing microgel concentration for different ionization degrees. Notice that the curves are vertically shifted by 0.5 units for better visualization. In our context, microgel concentration is equivalent to the monomer concentration for fixed microgel structure. From the simulations (points), we observe that the swelling ratio decreases very slowly at small concentrations and presents a more pronounced decrease at larger ones for fixed ionization. These deswelling is a consequence of the increased screening inside the microgel due to the (entropy-mediated) migration of counterions into the microgel because of the effective reduction of bulk volume resulting from the larger microgel concentration. The latter is endorsed by the decrease in |Z net | with augmenting microgel concentration, see Fig. . When comparing different ionizations, microgels deswell with approximately same rate at low concentrations independently of ionization degree. While at high concentrations, microgels with larger ionization degree tend to deswell faster, because the increase in inner screening is more pronounced due to the larger system ionic strength, namely the presence of more counterions in the system. Analyzing the theoretical predictions, we observe that both methods perform fairly well, especially at high ionizations as expected. Similarly to Fig. , we have taken φ coll = 0.22. Both models decribre qualitatively well the deswelling as microgel concentration is increased. However, they present an overestimation of swelling a large concentrations, which is more significant in the Gaussian case. The weaker performance of the methods at low ionization degrees is related to a stronger migration of counterions into the microgel, as seen in the steepest decrease in the microgel net charge, see Fig. .