The article at first introduces the emergence of ‘postmodernist’ analyses in the discipline of international relations. It then elaborates some central tenets of poststructuralist philosophy. Taking these perspectives together, it shows how ‘postmodern’ ways of thought can be utilised for the study of borders and boundaries. It argues particularly that seemingly small changes in bordering processes can serve as indicators for far-reaching structural change. It concludes by identifying the merits of ‘postmodernism’ as not to lie in providing a coherent approach, but as providing an opening of many new routes of inquiry on the subject of borders and boundaries.