 This research optimised a single-fibre cell separation method for analysing over 200-dimensional sizes of kenaf and opossinum fibres, revealing that the average length and diameter of kenaf and opossinum fibres are 2.16 millimetres and 10.56 micrometres, respectively, and their diameters decreased with degumming while becoming more evenly distributed. This article was authored by Jin Liu, Yang Song, Guangting Han, and others.