Here's how to list a directory size from the terminal.
Get a size sorted list of directories and their estimated size (file space usage) in linux (Ubuntu, in my case).
You can customize how deep you want to go, in the case below only first level folders will be listed.
du -h --max-depth=1 | sort -hr
921M . 128M ./02 102M ./03 93M ./01 90M ./06 88M ./05 81M ./04 74M ./09 71M ./11 70M ./12 53M ./10 43M ./07 32M ./08