More can always be said on land amounts and holdings, so if anyone would like to write up a post of their own, please don't let this one stop you! Further insight is always welcome, especially if it comes from outside the British Isles, as the posts I'm about to link cover them.

For the meantime, OP, you may be interested in the Anglo-Saxon take as answered by u/BRIStoneman, and they also have a further post where they clarify some thoughts.