Bringing together a variety of outlooks from comparative law, legal theory, organizational sociology, socio-legal studies or political science, this Joint Working Papers explores the cognitive equipement through which international judges perform their role. The notion of ‘fabric’, borrowed from the Science and technology studies, and Bruno Latour in particular, is used here as a common entrypoint enabling to consider altogether the (legal and non-legal, formal and unformal) tools and templates that contribute to shape international judicial decision-making: ‘best practices’, judicial compendia, routinized legal repertoires, legal methodologies, standard operational modes, etc...