Humility is an understudied virtue in positive psychology. Both conceptual and methodological challenges have retarded its study. In this article we discuss how humility has been defined. Specifically researchers disagree whether humility refers to the accuracy of an individual's view of self or whether humility primarily describes someone's interpersonal stance toward others. We critique four approaches that researchers have used to measure humility: self-reports implicit measures social comparisons of self to others and informant ratings of humility. We then theoretically elaborate on the later method which has been mostly overlooked. Accordingly we present a model of relational humility. We define humility as a relationship-specific personality judgment and we describe the relationship factors that affect how humility is perceived [Funder D.C. (1995). On the accuracy of personality judgment: A realistic approach. Psychological Review 102 652?670.]. Finally we provide next steps for researchers using a relational approach.