Size of dust continuum vs. IR luminosity for this sample and data in the literature. Grey diamonds represent MS galaxies at z ∼ 1.2 in Valentino et al. (2020b) and blue squares mark the GOODS-ALMA sample (Franco et al. 2020; Gómez-Guijarro et al. 2022b). Green crosses show the medians of four local galaxy samples (Spirals: Bolatto et al. 2017; LIRGs: Bellocchi et al. 2022; ULIRGs: Pereira-Santaella et al. 2021); the dispersion of each sample is indicated by an error bar. The solid line shows the best fit to the high-z data points, and the dashed lines mark the 1σ scatter. Both local and high-z galaxies show an anti-correlation between dust continuum size and infrared luminosity.