DirSize can show the size of the folders, it is a command line tool to show you how much disk space is used and wasted in each directory. You will find that it is far faster and more accurate than other similar tools, completing scans of 1.2 Terabyte disk structures in 40 minutes while other apps take 2 hours and are still not complete.

The license of this software is Free Trial Software, the price is $19.95, you can free download and get a free trial.