In response to the growing interest in ways to take forward an agenda for a more global urban studies, this essay advocates a comparative approach to theory building which can help to develop new understandings of the expanding and diverse world of cities and urbanization processes, building theory from different contexts, resonating with a diversity of urban outcomes but being respectful of the limits of always located insights. The essay is inspired by the potential of the comparative imagination but, mindful of the limitations of formal comparative methods, which in a quasi-scientific format can drastically restrict the scope of comparing, it outlines ways to reformat comparative methods in order to put them to work more effectively for a more global urban studies. The essay proposes a new typology for comparative methods based on the vernacular practices of urban comparison, tracing these through the archives of comparative urbanism. It also suggests some lines of philosophical reflection for reframing the scope and style of theorizing. New repertoires of comparativism are indicated which support the possibility of a revisable urban theory, starting from anywhere.