Histograms of FWHM widths derived from Gaussian fits to the column density profiles of Gaussian-shaped synthetic filaments. The distributions of input and measured FWHM widths are displayed in black and red, respectively. The range radii used for the Gaussian fits was [0, 1.5hr]. Panel a: distribution of individual FWHM widths measured along and on either side of the filament crests for input FWHM width (W = 0.1 pc) constant along the filament length (same as Fig. B.2A). Panel b: distribution of individual FWHM widths measured along and on either side of the filament crests, for input individual FWHM widths with a Gaussian distribution centered at 0.1 pc with a standard deviation of 0.05 pc. Panel c: distribution of median FWHM widths “averaged” over each filament crest for the same input FWHM distribution as in panel B.