A dozen is a unit of measurement equal to 12 items, widely used to quantify goods, objects, or concepts in everyday and specialized contexts. It measures the count of individual units within a set, making it easier to track inventory, manage stock, and communicate quantities. The symbol for dozen is often represented as "doz" or "dz." Standardized in trade and commerce, a dozen is particularly prevalent in the sale of baked goods, eggs, and small items, where it simplifies transactions and packaging. Its importance extends into scientific and practical applications, providing a convenient and universally recognized way to express quantities, thereby enhancing clarity and efficiency in communication and calculation.