Here's someone's answer from a similar query elsewhere on the internet:

Assuming no special formatting, and that images and tables took up only as much space as their text representation (much smaller than they actually are), where each page contained 8000 characters, and each volume 400 pages, Wikipedia would cover more than 1250 volumes (a 1250 estimate was made based on data from August 2007, when there were as many as five hundred thousand fewer articles). If nice formatting were added and images and tables were expanded, this number would be greatly expanded; perhaps even (though this is pure speculation) to double the estimate size.

By the way, this is including only the English Wikipedia: just based on the _number of articles_ in other languages, a copy in every language available might be as much as 5 times as big (though it would be likely to be smaller than that as the English Wikipedia has, on average, longer pages than most Wikipedias).

Regardless, it is doubtful that Wikipedia *can* be printed; by the time a single copy was published it would be out of date.

My source includes an image (of the August 2007 estimate), you may find this most illustrative.

    * 2 months ago

Source(s):
http://en.wikipedia.org/wiki/Image:Size_...