How to find the large folders in Windows 7

[RollWave]

I have some mysteriously huge folders somewhere eating like 30 gigs but I cant seem to find them. Anyone have a clue as to how I can identify large folders?

 

[stlcardinals]

http://windirstat.info/

Nice program that will give you a folder listing as well as a nice graphical representation of the data on any volume.

 

[RollWave]

Thanks, thats perfect. Much appreciated!