Rest-frame near-infrared effective radii, measured from the F410M filter, are plotted against Sérsic indices for the nine DSFG members in the Spiderweb protocluster. For comparison, 27 (55) field DSFGs at z ∼ 1 − 1.5 (z ∼ 2 − 2.5) from the literature (Cheng et al. 2022, 2023; Boogaard et al. 2024; Price et al. 2025; Ren et al. 2025) are shown as violet and pink circles, respectively. The median values for each redshift bin, along with their median absolute deviations, are indicated by larger markers of the same colour with corresponding error bars.