Position and width (FWHM) of the UV bump of the extinction law A(λ-V)/E(B-V) expressed as a function of 1/λ in μ⁻¹, here plotted as a function of the EW normalized to the reddening E(B-V) of the σ-type DIBs at 5780 Å (top graphs) and at 6284 Å (bottom graphs). The size of the marker is smaller for LOSs flagged as “multiclouds” based on 3D dust maps (Flag 0, see text). The linear fits are restricted to “monocloud”-type LOSs (Flag 1). They are extrapolated to reach the values measured for the galaxy JADES-GS-z6-0, indicated by thick horizontal dash-dotted lines. An approximated corresponding scale in Å units is given on the right. It is interpolated linearly between the mean Milky Way values and the JADES measured values. Average Milky Way values are indicated by horizontal dashed lines. Both bump position and width are found to decrease when the abundance of the DIB carrier is increasing. The color scale refers to the dust extinction A(V) along the LOS from the Sun to the target star. It allows one to identify potential biases related to the amplitude of the LOS extinction.