Market size is directly proportional to which of the following?

Market size is directly proportional to the presence and interaction of both sellers and buyers. In economic terms, market size refers to the total potential sales available for a product or service, which depends significantly on the number of buyers who are willing to purchase and the number of sellers offering these goods or services.

When considering the relationship, an increase in buyers typically leads to a larger market size because there is greater demand for products. Simultaneously, an increase in sellers can contribute to market size by enhancing supply and competition, potentially attracting more buyers due to a greater variety of options and price points.

Both elements are fundamental to the dynamics of a market: buyers create demand, while sellers provide supply. Therefore, the interaction between the two groups directly influences the overall market size and its growth potential.

The other options focus on only one aspect—either just sellers or just buyers—which does not provide a complete picture of market dynamics. Total monetary involvement is more of a consequence of market activity rather than a direct measure of market size, as it reflects the financial transactions that occur but does not encompass the quantity of buyers and sellers actively participating in the market.