>>/9751/
> find...-printf...%S...
That was a good method; the command finished quickly. Used awk because I don't have gawk:
> $ find . -type f -printf "%S \040%p\n" | awk '$1 < 1.0 {print}' # 040 I think is octal for 020 in hex which is " "

Full version of a sparse file is attached. Repaint because I think there were complaints that the G4 Celestia toy was too pink. (Also in the image: "Watership Down", a book.)