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A full-size bed measures 54 inches wide by 75 inches long. The full-size bed is sometimes referred to as a double bed as well. This was the common couples bed in the 1960s or 1970s, due to rooms being built much smaller then.


Full-size mattresses are typically 53 inches wide and 75 inches long. Sometimes called a double mattress, a full-size mattress can comfortably fit one person shorter than 5 feet 5 inches.


A single, or twin, mattress measures about 39 inches by 75 inches. An extra-long twin bed is 80 inches long and may be more suitable for an adult. Single bunk beds measure 39 inches by 75 inches, but narrow bunks measuring 36 inches wide are also available.


The standard full-size bed frame is 54 inches wide and 75 inches long. There may be some variation, particularly in adjustable bed frames that can expand to king- or queen-size or contract to twin-size; 80 inches is a common length for these.


A queen-size bed measures 60-inches by 89-inches. Queen-size is recommended for two adults or one person who enjoys stretching and spreading out while sleeping.


Bed size is directly related to corresponding mattress size. The standard mattress sizes are twin (39 by 74 inches), twin XL (39 by 80 inches), full (54 by 74 inches), queen (60 by 80 inches), king (76 by 80 inches) and California king (72 by 84 inches).


A full size mattress is 54 inches wide by 75 inches long. The depth of the mattress can vary from manufacturer to manufacturer and can be an important consideration when purchasing sheets. Extra-deep mattresses require sheets constructed to match, or queen-size sheets can be used and tucked to fit.


A standard king-size bed is 76 inches wide by 80 inches long. This mattress size is the widest size commonly available in the United States.


Examples of bed sizes on a dimension chart include a twin, which is 39 by 75 inches, and a full, which is 54 by 75 inches. Another bed size is a queen, which measures 60 by 80 inches.


The dimensions of a twin-size bed are about 38 inches wide by 75 inches long, according to the Better Sleep Council. About.com puts the dimensions at 39 inches wide by 75 inches long.