Quick and dirty way to list pdf print dimensions in directory structure.
find -name "*.pdf" -o -name "*.PDF" > pdf.txt
#!/bin/bash
# Depends on imagemagick
while read p; do
#echo "$p | "
# identify -verbose "$p" | grep "Print size"
identify -format "%[i] | %[printsize.x] | %[printsize.y]\n" "$p"
done < pdf.txt
pdfinfo test.pdf | grep "Page size" | grep -Eo '[-+]?[0-9]*\.?[0-9]+' | awk -v x=0.3528 '{print $1*x}'
identify -verbose some.pdf | grep "Print size" | grep -Eo '[-+]?[0-9]*\.?[0-9]+' | awk -v x=25.4 '{print $1*x}'