Standard American bed sizes include twin, full, queen and king. Tall sleepers may prefer a twin-XL, which is 5 inches longer than a standard twin bed, or a California king, which is 4 inches narrower than a standard king bed but is 4 inches longer.
Mattresses are usually slightly smaller than their matching bed frames to ensure a good fit. Twin mattresses measure 39 by 75 inches and are big enough for one child or one adult, though a small child may need guard rails for safety. They are suitable for daybeds, bunk beds, small bedrooms and guest rooms. They are also good choices when siblings must share a room.
Full-sized mattresses measure 54 by 75 inches. They can easily accommodate a large child or an adult but are a tight fit for two adults. Restless sleepers may appreciate the extra space compared to a twin bed.
Queen beds are the most popular size, measuring 60 by 80 inches. They provide enough room for two adults to sleep comfortably and fit into most bedrooms in modern homes.
King beds are 76 by 80 inches and provide plenty of room for two adults. They are good choices for people whose children or pets like to sleep in the same bed.