Disruption grain size vs. radial distance from the central star for different values of tensile strength ﹩{S}_{\max }={10}^{6}\mbox{--}{10}^{10}\,\mathrm{erg}\,{\mathrm{cm}}^{-3}﹩, and for different dust-to-gas ratios η = 0.002 (left panel) and η = 0.01 (right panel), assuming the original dust has the maximum size ﹩{a}_{\max }=0.5\,\mu {\rm{m}}﹩ and is fully disrupted by RATs (f _high-J = 100%). Disruption is more effective for grains with lower ﹩{S}_{\max }﹩ and lower dust-to-gas ratios.