It's odd the differences in language that means we seem to mean the same things - but don't, between the US, Australia, Canada and the UK.

In our word usage a queen sized sheet wouldn't fit a pair of twins as a single is 3feet wide - so two of them would be 6feet wide. But a king sized bed is only 5 feet wide - so a queen sized bed to me is a standard 4foot 6inch double!