A double bed is a mattress size that falls in between twin and queen. It's a moderately sized bed, providing a spacious feel for a single adult, or a somewhat cramped feel for a couple. The terms double and full are interchangeable.Double or Full is larger than a twin (single) and smaller than a queen. Double means two people (double) can sleep on it if need be and the term FULL I think is because it is a full sized bed, not a kids single bed, or twin.A double bed can comfortably accomodate two people.The different types of double bed are easily available at the Tirath Decor.Bed sizes range from small sizes such as single/twin,full which are great for kid's teens and young adults.Larger sizes include Queen,Standard Eastern King and California King which are ideal for larger children and adults.