Furthermore this article only states: “They are not of a standard size, so will not be measuring devices.", which is incorrect since for use as a coincidence ra

Furthermore this article only states: “They are not of a standard size, so will not be measuring devices.", which is incorrect since for use as a coincidence rangefinder (standardized to some standard) only the ratios between sizes of opposite holes would need to be standardized, not the size of the thing as a whole. The paper "Roman Dodecahedron as dioptron: analysis of freely available data" (https://arxiv.org/abs/1206.0946 https://arxiv.org/abs/1206.0946) collects measurements of opposite hole pairs for 7 artefacts for anyone wanting to do their own analysis.