The size of a congregation affects the ability of clergy to minister effectively. The skills and attitudes that are successful in one sized congregation are different from those that will lead to success in another. In part one of this article, Oswald provides a good overview of the different sizes of congregations—family, pastoral, program, and corporate—as first articulated by Arlin Rothauge. He describes clergy roles and congregational expectations in the different sizes. In part two, he discusses the changes that are necessary when a congregation's membership declines, changing its size profile.