What is the case when you need to find out what is the size of the folder? Normally you have to right click on the folder and choose Properties to check out the size. With Folder Size Explorer Extension, this nifty little tools will add a new column for showing size on folders in detail view:
Folder Size Explorer Extension adds a new column to the Details view in Windows Explorer. The new column shows not only the size of files, but also the size of folders. It keeps track of which folders you view, and scans them in the background so you can see complete size of all files within the folder. It’s very useful for cleaning up your disk. Once you get used to having that information available, a directory listing simply looks incomplete without it!