How much space emacs backup files are using...?

Every time I use emacs, it automatically saves a backup file which filename ends with "~".
From time to time, I issue a recursive find command to wipe out (delete) every emacs backup file from my home folder.
find . -iname \*~ -exec rm -rfv {} \;
And everything is clean.

I do it strictly to clean things up... not for any disk space concern... But I was wondering how much disk space those backup files are consuming...

So, instead of an rm command, I had executed a df and piped all to awk to summarize...
find . -iname \*~ -exec du -s {} \; | cut -f 1 | awk '{s+=$1} END {print s}'

This time all the emacs backup files were consuming only 1.6M, which isn't big deal... but I think it is better to get rid of them.

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