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tokens: We acknowledge useful comments from an anonymous referee and discussions with Harry Warren, Jim Klimchuk, Karel Schrijver, Amy Winebarger, and Craig Deforest. Part of the work was supported by the NASA contracts NNG04EA00C of the SDO /AIA instrument and NNG09FA40C of the IRIS mission. Note added in proof. While this manuscript went into print, we were informed that work in progress shows that no clear evidence of observed features smaller than about 3.5–4.5 Hi-C pixels (≈250–330 km) was found in an ongoing study, using a (Fourier-based) noise-gating technique (Craig DeForest, private communication, 2017). In our view, this corroborates our result of a lower loop width cutoff w min below the peak (or most frequent) width of w p = 550 km.