PSR B1112+50: example of how the widths of the full profile were calculated using the four methods described in the text. On the left-hand side is the real profile. On the right-hand side, for comparison, the noise-free profile obtained from the Gaussian fit. In panel a), the shaded cyan area represents w_eff. The dashed vertical lines represent w_pow, calculated as shown in panel b): the cumulative distribution of the normalised profile. The solid line demarcates w₁₀ as obtained from the Gaussian smoothed profiles (which are shown in panel a), on the right). The measurement of w₁₀ is consistent and overlapping with w_op (see text for details).