Previous models of cross-cultural differences fail to adequately account for transnational patterns of social media use, especially as it relates to notions of privacy. Based on our study of young transnational Saudis, we propose a new model, the rubber band model of transnational privacy, to account for the way social media users stretch their conceptualization of privacy as practiced in their societies of origin to include new norms and practices in their hosting society. We explore how this process unfolds through a series of ethnographic interviews conducted with young Saudis at different stages of their migratory journey from Saudi Arabia to the United States and back. Our findings hold important implications for viewing privacy as a dynamic concept related to the fluid production of identities in online spaces. The model of privacy we put forth seeks to inform the culturally sensitive development of information and communications technology (ICTs).