A full bed, also known as a double bed, is a type of mattress and bed frame that measures 54 inches wide by 75 inches long. It is larger than a twin bed but smaller than a queen bed, making it a popular choice for single sleepers who enjoy extra space or for couples who don't mind snuggling. Full beds are commonly used in smaller bedrooms, guest rooms, and apartments due to their compact size. They can accommodate one or two people, but may feel cramped for taller individuals. Full beds are available in various styles and materials, allowing for personalization in bedroom decor.