What describes the optimum size of a firm?

The optimum size of a firm is defined as the most efficient firm size at which it can produce goods at the lowest average cost. This point occurs when the firm maximizes its economies of scale while minimizing its average costs per unit of output. When a firm operates at this optimum size, it is able to efficiently utilize its resources, spreading fixed costs over a larger output and benefiting from increased operational efficiency.

At this level, the firm maintains a competitive edge, as it can offer its products at lower prices than others due to its cost structure. This is critical in markets where competitive pricing is essential for gaining market share and sustaining profitability. Additionally, operating at minimum average costs supports long-term viability and allows firms to adapt to changes in market demand or production technologies more flexibly.