I work for a furniture manufacturing company (beds and chairs). We never use the terms "king" size or "queen" size because people's understanding and expectation of what it means, varies so much. Also, we don't use metric units for beds. Ours are all made to order and we can accommodate 6'9" and 7'0" (and anything else if you really wanted it) lengths. But about 75% of the beds are 6'6" length and the others 6'3". The widths are typically 2'3", 2'6", 3', 3'6", 4', 4'6", 5' but we can join 2'3", 2'6, 3'0" etc as desired and obtain a headboard to match and fit.