They vary in length too,we tried some centre fixed bed models and the beds are too short for my 6'2"frame.
Some tranverse layout can be short too.
My advice is try them.
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As people say, they are all different lengths, shapes and widths.
My advice would be to visit a showroom and lie down on some beds to get an idea of what you want, for as well as the beds themselves there is where they are placed - to the side or rear of the 'van, or in an island format.
In particular though, be aware that some mattresses' corner cuts are quite big, so one of you risks having feet hanging off the edge.
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