Key size properties of our targets in the ring model approach: corotation radii R_co (black circles), magnetic truncation radii R_mag for a magnetic field of 1 kG (gray triangles), range of sublimation radii R_sub (gray lines), and half-flux radii a derived fromthe GRAVITY measurements (white squares) including 1 σ error bars (red lines). The width-to-radius ratio w is not included in this schematic view. The targets are ordered by increasing stellar luminosities, from top to bottom. For comparison, we display the achieved angular resolution (blue rectangles) defined by λ₀ ∕2B_max with λ₀ = 2.15 μm the central wavelength of the K band, and B_max the maximal interferometric baseline for each data set. All angular resolutions are convertedin au by using the distances of Table 1. For DR Tau and AS 353, the blue arrows indicate the exact location of the blue mark. Two values of R_co are reportedfor AS205 N from the literature (see Table D.1).