Understanding when scale creates advantage — and when it creates bureaucratic drag — is essential for strategic decision-making. This article explains the economic foundations of scale economies (spreading fixed costs, learning curves, bargaining power) and scope economies (shared resources, cross-selling, brand leverage). It also examines diseconomies of scale: coordination costs, cultural dilution, and the innovator's dilemma. The framework helps leaders determine the optimal size for their organization and when to pursue growth versus focus.