Ah - I guess playing around in the terminal kind of answered my own question.
Code:
carlos@cwilliams:~/Desktop$ ls -lh
total 25M
drwxr-xr-x 2 carlos carlos 4.0K 2007-01-09 20:13 file
-rwx------ 1 carlos carlos 340 2007-01-02 18:25 Firefox.desktop
-rw------- 1 carlos carlos 25M 2006-01-17 11:48 M4V00003.MP4
carlos@cwilliams:~/Desktop$ du -h file/
9.5M file/