This article considers how state-controlled borders and bordering practices are conceptualized, what they symbolize, and the consequences of these representations. By analyzing critically the metaphors that are used to describe borders and migration, and by drawing on empirical research on policing migration in the United Kingdom, an alternative metaphor, where borders are depicted heuristically as mirrors, may be instructive for capturing the multiple functions of borders and their racializing consequences. I propose that borders and their control across Western liberal democracies are like mirrors that represent, reflect and, at times, deflect the reality of exclusionary attitudes and the racialized anxieties they foment. Harnessing the function of borders through a process of self-reflection, where societies hold a mirror to themselves, may be both instructive and transformative. By reconsidering the metaphors employed in relation to migration, the article contributes to interdisciplinary debates on border studies, critical race perspectives and the criminalization of mobility.