R_68% radius plotted against the dust mass for the full sample in this work. Unlike Fig. 6, we use R_68% values here for consistency with the work of van der Marel & Mulders (2021). The Herbig disks are divided into the Meeus et al. (2001) group I and II disks. disks with one (⊙) and two or more (⊚) (visible) rings are indicated as well. The upper limits on the radius are plotted as triangles. The grey scatter points and radius upper limits are the T Tauri disks of van der Marel & Mulders (2021). The large arrow shows the range of upper limits on the undetected disks. Three pairs of Herbig group I and II disks are circled and numbered 1-3; these are further discussed in Sect. 5.4 and Fig. 10. For extra context, the positions of the large T Tauri disks IM Lup and V1094 Sco are shown as green stars (Ansdell et al. 2016, 2018; van Terwisga et al. 2018; Cleeves et al. 2016).