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USA Bed and Mattress Dimensions ( in Centimeters )WidthLengthSpace Per PersonCommentsStandard Bunk Bed Size99.1 cm190.5 cm99.1 cm x 190.5 cmSmall, for one adult or child; good selection for school-age children; upper and lowerNarrow Bunk Bed Size91.4 cm190.5 cm91.4 cm x 190.5 cmSmall, for one child; good selection for pre-teens; upper and lowerTwin Bed Size / Single Bed Size99.1 cm190.5 cm99.1 cm x 190.5 cmSmall, for one adult; good selection for guest accommodationsTwin Extra Long Bed Size99.1 cm203.2 cm99.1 cm x 203.2 cmBed linens can be difficult to locate and purchaseFull Bed Size/ Double Bed Size137.2 cm190.5 cm68.6 cm x 190.5 cmWide enough for a large adult or two small adultsQueen Bed Size152.4 cm203.2 cm76.2 cm x 203.2 cmBest selection for two adults but possibly too small for someCalifornia Queen Bed Size152.4 cm213.4 cm76.2 cm x 213.4 cm10.2 cm longer than standard QueenExpanded Queen Bed Size167.6 cm203.2 cm83.8 cm x 203.2 cm15.2 cm wider than standard QueenSuper Queen Bed Size167.6 cm203.2 cm83.8 cm x 203.2 cm15.2 cm wider than standard Queen, also thickerKing Bed Size193 cm203.2 cm96.5 cm x 203.2 cmStandard KingCalifornia King Bed Size182.9 cm213.4 cm91.4 cm x 213.4 cmNot as wide but longer than a standard KingGrand King Bed Size203.2 cm248.9 cm101.6 cm x 248.9 cmFor really large and tall peopleUK Bed And Mattress SizesWidthLengthSpace per personCommentsSingle Bed Size91.4 cm190.5 cm91.4 cm x 190.5 cmSmall, for one adult; good selection for guest accommodationsBunk Bed Size91.4 cm190.5 cm91.4 cm x 190.5 cmSmall, for one adult or child; upper and lowerDouble Bed Size137.2 cm190.5 cm68.6 cm x 190.5 cmWide enough for a large adult or two small adultsKing Bed Size152.4 cm198.1 cm76.2 cm x 198.1 cm  Super King Bed Size182.9 cm198.1 cm91.4 cm x 198.1 cm