Let’s calculate together. The basic minimum track in mp3 format long about 3 minutes and 17 seconds and its file size about 3 megabytes. The ID3v1 tag always increase the file size on 128 bytes, ID3v2 tag could be about from 2 to 4 Kilobytes as average values. So, using the both ID3 tags increase the files size on 0,11%, so their existing in mp3 files not increasing the file size highly, but the tags using will give to the users more useful information.
