Mattress comparison controls and result
Before you buy: nominal dimensions and apparent overlap do not guarantee compatibility. Check the seller’s finished width, length and tolerance, plus the frame’s internal opening.
Read the complete US queen vs UK king comparison →Curated decision guides
Twin XL adds length only; a Twin frame or fitted sheet should not be assumed to accept it.
ComparisonUS Full vs Queen mattress sizeQueen is seven inches wider and five inches longer using the sourced US conventions in this dataset.
ComparisonUS King vs California King sizeRegular King is wider; California King is longer. Their bedding and frames are not interchangeable by name.
ComparisonUK Double vs King bed sizeThe extra length is as important as the width when checking a bedstead or fitted sheet.
ComparisonUK King vs Super King bed sizeSuper King requires a wider opening and different fitted bedding; its nominal length does not increase.
ComparisonUS Queen vs UK King mattress sizeUS Queen is 2.4 cm wider and 3.2 cm longer on nominal figures.
ComparisonUS King vs UK Super King sizeUS King is about 13 cm wider and 3.2 cm longer.
ComparisonUK Double vs US Full mattress sizeUK Double is 3.8 mm wider; the exact-converted US Full is 5 mm longer.
ComparisonQueen mattress size by countryUS and Australian Queen examples are close; UK Queen usage points to the much smaller Small Double convention.
ComparisonKing mattress size by countryUS King is widest of the three selected conventions; UK King is the narrowest.
ComparisonAustralian Queen vs US Queen mattress sizeThe Sealy Australian example is 1 mm wider and 2 mm shorter than the exact-converted US Queen convention.