https://www.epo.org/en/service-support/faq/about-us/call-artists-paper-transformation/what-average-size-average-scanned
What is the average size of an average scanned paper file?
The average paper file has 110 pages. Each page is around 41 kB as a scanned image. This makes a total of 4.5 MB in scanned images for an average paper file.