Radial gap widths. From left to right, radial gap width as a function of dust size for three different planetary masses (1, 5, 10 M_⊕). The shaded regions represent the uncertainty in the width measurement, which is equal to the local width of the bins used for computing the dust density. Points denoted with stars refer to gaps common to both planets, so they are reported for each one. When no gap is observed (e.g., for the outer planet in Model 3 and the single planet in Model 2S), no width is reported.