I often search for PDF files (Books) in Google using
filetype:pdf search operator. Quite often there are multiple spammy PDF files with their link titles being similar to books I am searching for. Those files are ususally much smaller in size compared to book files. So in the book search, the file size could be a reasonably good indicator if this particular PDF link worth a download, or not.
I wonder if there is a Chrome browser extension that would show PDF file SIZES in Google Search Results for all PDF links, preferrably without downloading any file?
It might look something like this: