A number of disciplines pursue research into organisations. This organisational research serves to improve knowledge regarding the interaction, behaviour and direction of humans and groups. Many of these disciplines use proprietary methods for and approaches to such research. Because Information Systems (IS) has drawn on several of these disciplines for foundation, a number of research approaches exist for examining organisations within the IS domain. Organisational size measurement, as one research approach in the IS literature, has received considerable application but little critical examination. This study examines six leading IS journals over an eleven year period in order to document and classify the metrics used for organisational size measurement in the IS research literature. The results show a large number of metrics in scholarly use, with studies offering little supportive discussion regarding the application of these metrics. The findings raise a number of issues that are out of the scope of this study: these issues merit further research.