[How big is Westeros? Is it the size of Europe, or even larger?]

I have deliberately tried to be vague about such things, so I don't have obsessive fans with rulers measuring distances on the map and telling me Ned couldn't get from X to Y in the time I say he did.

However, if you really must know, you can figure out the distances for yourself. The Wall is a hundred leagues long. A league is three miles. Go from there.

But if you turn up any mistakes in travel times by using that measure, let it be your secret.