ABSTRACT:The effect of state size on level of democratization has been a topic of interest to political scientists. However, studies have largely focused on democratic regimes, leaving unexplored the implications of state size for the regime persistence of hybrid regimes. This article compares two Chinese island cities with hybrid regimes through political analysis supplemented by interviews, and argues that a smaller regime is more likely to be authoritarian than a larger one. The case of Macau shows that the very small size of a 'microstate' helps central authorities to exercise political control, stifle political pluralism, and monopolize opinions, all of which strengthen regime persistence. In contrast, the case of Hong Kong shows that a merely 'small state', a larger political entity, creates political polarization, encourages political competition, and diversifies opinions, resulting in a more confrontational state-society relationship. This paper contributes to the literature by examining the effect of state size on regime persistence in hybrid regimes and explaining political development in Macau and Hong Kong from an alternative geopolitical perspective.