Comparison between rings in debris discs from ARKS and the sample of resolved protoplanetary discs compiled by Bae et al. (2023). Discs with multiple rings are separated into their constituent rings. The top panel shows the distribution of fractional widths, where both the distributions derived from frank and parametric modelling are shown for debris discs. The bottom panel shows the distribution of the number of rings in a disc, where the ring counts in debris discs are based on the frank profiles, as labelled in Fig. I.1.