Inforix is a very useful utility which count size of subdirectories and show the result in foolproof way. It can be called from shell extension of Windows explorer (right button click submenu), from Windows start menu or using command line.
LicenseFree to try
File Size523.47 kB
Operating System Windows XP Media Center Edition 2005 Windows Server 2008 x86 Windows 2003 SP 1 Windows 7 64-bit Windows Server 2008 Itanium Windows 2003 32-bit Windows 7 Windows 7 32-bit Windows XP 32-bit Windows Windows Server 2008 Datacenter Windows Vista Business Windows 2000 Advanced Server Windows Vista Itanium 64-bit Windows Vista 32-bit Windows Vista Home Basic Windows XP Home Edition Windows 2000 Windows XP SP 2 Windows 2000 SP 3 Windows Vista Windows Server 2008 Standard Windows XP 64-bit SP 2 Windows 2003 Itanium 64-bit Windows 2000 Professional Windows Server 2003 x64 R2 Windows XP Media Center Edition 2003 Windows Server 2008 Windows XP Windows XP Tablet PC Edition 2005 Windows 2003 Windows XP Itanium 64-bit SP 1
System Requirements2 Mb disk space