du -h -s / Full / Path / To / Folder /

Output example for folder with attached folders:

669m IDEA-IC-162.1812.17

Answer 1, Authority 100%

Get the size of the folder using the Du command.

Team.

du -h - emax-depth = 1 | grep folder

Conclusion.

158m. / Pack

Answer 2, Authority 76%

You can also easier

du -h & lt; directory name & gt;