List All
$ cd documents
$ find . -name "node_modules" -type d -prune | xargs du -chs
--- Example output ---
25M ./Github/Trilon.io/node_modules
482M ./Github/Some_Demo/node_modules
707M total
Remove All
$ cd documents
$ find . -name "node_modules" -type d -prune -exec rm -rf '{}' +