Understanding how and why users reveal information about their self in online social spaces and what they perceive as privacy online is a central research agenda in HCI. Drawing on 30 in-depth interviews, in this paper we focus on what type of information users disclose, to whom they reveal information, and concerns they had regarding self-disclosure in social Virtual Reality (VR)where multiple users can interact with one another through VR head-mounted displays in 3D virtual spaces. Our findings show that overall, users felt comfortable to disclose their emotions, personal experience, and personal information in social VR. However, they also acknowledged that disclosing personal information in social VR was an inevitable trade-off: giving up bio-metric information in order to better use the system. We contribute to existing literature on self-disclosure and privacy online by focusing on social VR as an emerging novel online social space. We also explicate implications for designing and developing future social VR applications. CCS CONCEPTS • Human-centered computing → Empirical studies in collaborative and social computing.