Deconvolved FWHM width against central column density for the selected sample of 599 filaments. The dotted horizontal lines mark the spatial resolutions of the column density maps used in the analysis for each field. The solid line running from top left to bottom right shows the central (thermal) Jeans length as a function of central column density [] for T = 10 K. The upper x-axis shows an approximate mass per unit length scale derive from the bottom x-axis scale as for W_fil = 0.1 pc.