A king mattress is a large bed size designed to provide ample space for couples or individuals who enjoy extra room while sleeping. It typically measures 76 inches wide by 80 inches long, making it one of the largest standard mattress sizes available. This size is ideal for those who want to maximize comfort and minimize disturbances from movement during the night. King mattresses come in various types, including memory foam, innerspring, and latex, catering to different sleep preferences. They are often paired with a king-sized bed frame and bedding, ensuring a cohesive look in the bedroom. This size is popular among families and those who share their bed with pets.