Research in international schools has lagged behind the growth of such schools (Lee et al, 2012). This paper offers support to international school leaders by identifying the ten most important characteristics of international schools as reported by three significant stakeholder groups (administrators/teachers, parents and students) in one case study international school. An initial phase utilised a Delphi framework whereby interviews led to the identification of 68 separate items, ranging from school ethos to teachers’ credentials, which formed the basis of a follow-up questionnaire which was implemented following piloting. It was found that for 46 of the 68 items the three stakeholder groups were not statistically independent, sharing a common perspective on these items’ relative importance. Similarly, four items appeared in all three stakeholder groups’ top ten, while six items appeared in two out of three stakeholder groups’ top ten.