Nitpick. Given that the land mass where the events of LoTR take place is intended to be the Europe of a distant past, I expect it ought to be roughly similar in size, should it not?
Counter-nitpick: the area is the same. The Landmass is a lot bigger.
EDIT: I apologise, that was needlessly curt.
To clarify; If the Shire is suppoed to be southern England, then the Grey Havens are well out in what's now the Atlantic.