I have looked everywhere for adding the column to show folder size in Windows 7. When a folder is deleted to the recycle bin, the folder size is shown in the "Size" column. How do I mimic the recycle bin settings for all Windows Explorer viewing?
A free tool that does this can be found here: Folder Size
I do not recommend you installing any shell extensions or integration as those will slow down your system and will shorten the life of your hard drive due to the useless extra file operations.
The one that I recommend adds a context menu item in Windows Explorer named "Scan With Folder Size" and you can use it whenever you need it. The cool thing is that it can also display folders that are not visible even with ADMINISTRATOR account like "System
Volume Information" etc.
It is a great free tool that I use daily:
