Evolution of R₁ as a function of galaxy stellar mass, measured within 20% of R₂₀₀, over four different stellar mass ranges. For each simulation suite, we selected z = 0 galaxies at 10⁷, 10⁸, 10⁹, and 10¹⁰ M_⊙, within a bin of ±0.5 dex, and tracked their size-evolution over redshift up to z = 1, using five increasing z, from left to right. Each of the stellar mass ranges selected is indicated and zoomed in with brown, pink, yellow, and blue regions, respectively. The median value of the size and the stellar mass has been measured for each of the redshifts. Orange dots represent the size evolution of the AURIGA suite, while blue crosses and green squares indicate the HESTIA and NIHAO samples, respectively. The whole sample at z = 0, regardless of the simulation suite, is also shown as grey dots.