This is a selective review of the literature in regard to economic, social-psychological and organizational aspects of institutional size. The introduction contains some tables noting the increased size of individual institutions and the magnitude of changes that have taken place in the number of students enrolled in the nation's institutions of higher learning between 1937-38, 1950-60, and 1967-68. The first and second sections are devoted to a discussion of the various economic and social-psychological aspects of institutional size. The third section examines an alternative to the traditional form of university organization, the cluster college, as a possible organizational adaptation that might allow institutions to grow larger while still providing unique, small, and personalized educational environments. The concluding statement points to the lack of a definitive, widely applicable answer to the question of how big a given college or university should be and summarizes important points to be considered in decisionmaking about questions of size. (Author/AF)