Does Google Bookmarks show us how many total bookmarks we have?
I've searched high and low for such a basic feature that I think it is really weird that there isn't such a feature!
Well, there is no such feature. You cannot directly see how many bookmarks you have, but:
you can add up the sum of all the Unlabeled Bookmarks and the Bookmarks under various different Labels.
Otherwise, you can do as I do: Keep all the Bookmarks as Unlabeled, so that the Count of Unlabeled Bookmarks gives you the total number of Bookmarks you have.