Here is a chart displaying the common mattress sizes in the US, UK, and Australia in inches and centimeters.
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They should not be used to define the dimensions of a bed or a mattress because they differ around the world. The names given to mattress sizes such as Full, King and Queen are not standard sizes but nicknames. The dimensions of a ‘King size’ mattress in the USA are different from those in the UK or Australia.
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It should also help those from the UK and Australia to ensure that they are purchasing the correct mattress size for their needs.
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That is why we have compiled our mattress sizes chart US consumers will find useful. Unfortunately, there is no international standard, so take care when ordering and make sure you are purchasing your mattress based on dimensions that are suitable for your bed and not just by the name given to them. Bed sizes and mattress sizes vary from country to country.