Comparison between the observed disks luminosity and the predicted values assuming the disks are fully optically thick, considering a nonconstant flaring angle φ and L_* = L_int. Top: Same as Figure 10. Filled circles are the observations and squares are the predicted luminosity for each disk if the emission is fully optically thick. Bottom: Size versus the ratio of the observed disk luminosity to the predicted one assuming the entire disk is optically thick. Lower limits for the ratio are due to the assumed internal luminosity being an upper limit.