Four bits is a term used to describe a quarter of a dollar or 25 cents in American currency. Synonyms for four bits include two bits, which pertains to 12.5 cents; half a quarter, a fourth of a dollar, or simply 25 cents. In slang terms, the phrase two bits is commonly used to refer to the cost of a haircut in earlier times. In some areas, four bits can also refer to small change, such as coins or loose change. With the evolution of the digital era, the use of physical coinage and paper currency are becoming less common, and the relevance of these terms may shift in meaning or decrease in significance.