Sociologists often imagine society as spaces, yet how social spaces are related remains ambiguous in most theories. In developing his field theory, Bourdieu used extensively the concept of homology to describe the structural similarities across fields, but he had not taken seriously the spaces between fields or how fields are related to each other. Adopting the Simmelian approach of formal sociology, this article outlines six basic social forms by which social spaces are related. It argues that relations between social spaces (...) can be understood along two dimensions: heterogeneity and social distance. In terms of heterogeneity, social spaces can be kindred, symbiotic or oppositional. In terms of social distance, they can be linked, nested or overlapping. These social forms of interspatial relations are constituted by the boundary work of a variety of actors, including guardians, brokers and space travellers. The article provides a general vocabulary for thinking about how social spaces are related and how they interact across boundaries. (shrink)