It would be nice to have the pages match a printer paper sizes, so you could use the most common 8.5inch x 11 inch (Letter), Tabloid (11inch x 17inch), A4 (210mm x 297mm) and A3 (297mm x 420mm) the page size would grow/shrink to match. If you have a complicated page that needs some more space use the Tabloid/A3 size, and for basic pages use the Letter/A4 size. You could still print but it would allow some flexibility. There have been times when I needed just a little more space to prevent the page from looking messy and cramped.
--Brian F.