Quote Originally Posted by Hanna View Post
So I guess I would have to compare the size of all the mp3s, or all of them merged into one mp3 with the m4b file.
Select all mp3 files which you want to get size of
right mouse click
If you on Mac, select Get Info
If you on Windows, select Properties
I hope you are not on Linux, because I might need to look the procedure up if you are
Watch the size
Compare with m4b file size