A king bed is a large mattress size designed to provide ample space for two people to sleep comfortably. It typically measures 76 inches wide by 80 inches long, making it one of the widest standard mattress sizes available. This extra space is ideal for couples or individuals who enjoy having more room to move around while sleeping. King beds come in various styles and can be paired with different types of bed frames, such as platform beds or adjustable bases. They are often used in master bedrooms and can accommodate larger bedding accessories, including king-size sheets and comforters.