This is a sample TREE output from the registered version of ShowSize:

NOTE:
 - Here the tree lines are shown in ascii characters but the program, 
   by default, produces the tree using graphic characters.
 - You can even sort the whole tree (all levels) on dir-names or 
   their occupied sizes. Don't miss this powerful feature. Please
   register your copy today.

FINDING TOTAL SIZE OF TOP DIR: C:\WINDOWS ...

C:\WINDOWS   -> Occupies 70,589,514 bytes (67.32 MB) WINDOWS
+---INISAV       -> Occupies 14,249 bytes ( 0.01 MB) INISAV
+---ININEW       -> Occupies 14,242 bytes ( 0.01 MB) ININEW
+---SYSTEM       -> Occupies 34,768,012 bytes (33.16 MB) SYSTEM
|   +---WIN32S       -> Occupies 943,853 bytes ( 0.90 MB) WIN32S
|   +---VMM32        -> Occupies 56,533 bytes ( 0.05 MB) VMM32
|   +---IOSUBSYS     -> Occupies 392,628 bytes ( 0.37 MB) IOSUBSYS
|   +---COLOR        -> Occupies 557,994 bytes ( 0.53 MB) COLOR
|   \---VIEWERS      -> Occupies 1,277,952 bytes ( 1.22 MB) VIEWERS
+---OEMMOUSE     -> Occupies 184,473 bytes ( 0.18 MB) OEMMOUSE
|   \---PREINST      -> Occupies 62,838 bytes ( 0.06 MB) PREINST
+---VGAUTIL      -> Occupies 356,102 bytes ( 0.34 MB) VGAUTIL
+---TC           -> Occupies 9,508 bytes            TC
+---BC4          -> Occupies 162 bytes            BC4
+---TD           -> Occupies 991,696 bytes ( 0.95 MB) TD
|   \---TYPE         -> Occupies 991,696 bytes ( 0.95 MB) TYPE
+---MSAPPS       -> Occupies 3,700,180 bytes ( 3.53 MB) MSAPPS
|   +---EQUATION     -> Occupies 0 bytes            EQUATION
|   +---WORDART      -> Occupies 0 bytes            WORDART
|   +---PROOF        -> Occupies 342,219 bytes ( 0.33 MB) PROOF
|   +---MSQUERY      -> Occupies 1,416,035 bytes ( 1.35 MB) MSQUERY
|   +---GRPHFLT      -> Occupies 49,062 bytes ( 0.05 MB) GRPHFLT
|   +---TEXTCONV     -> Occupies 508,416 bytes ( 0.48 MB) TEXTCONV
|   +---MSGRAPH5     -> Occupies 0 bytes            MSGRAPH5
|   +---ARTGALRY     -> Occupies 1,384,448 bytes ( 1.32 MB) ARTGALRY
|   +---MSINFO       -> Occupies 0 bytes            MSINFO
|   \---SHEETCNV     -> Occupies 0 bytes            SHEETCNV
+---INF          -> Occupies 5,522,132 bytes ( 5.27 MB) INF
+---COMMAND      -> Occupies 1,295,050 bytes ( 1.24 MB) COMMAND
+---HELP         -> Occupies 1,588,175 bytes ( 1.51 MB) HELP
+---SYSBCKUP     -> Occupies 2,165,340 bytes ( 2.07 MB) SYSBCKUP
+---FONTS        -> Occupies 4,624,567 bytes ( 4.41 MB) C:\WINDOWS\FONTS
+---CURSORS      -> Occupies 20,418 bytes ( 0.02 MB) CURSORS
+---CONFIG       -> Occupies 654 bytes            CONFIG
+---MEDIA        -> Occupies 135,876 bytes ( 0.13 MB) MEDIA
+---TEMP         -> Occupies 0 bytes            TEMP
+---SPOOL        -> Occupies 0 bytes            spool
|   \---PRINTERS     -> Occupies 0 bytes            PRINTERS
+---STARTM~1     -> Occupies 36,685 bytes ( 0.03 MB) Start Menu
|   \---PROGRAMS     -> Occupies 36,685 bytes ( 0.03 MB) Programs
|       +---MAIN         -> Occupies 627 bytes            Main
|       +---ACCESS~1     -> Occupies 6,473 bytes            Accessories
|       |   \---SYSTEM~1     -> Occupies 1,481 bytes            System Tools
|       +---STARTUP      -> Occupies 967 bytes            StartUp
|       +---VGAUTI~1     -> Occupies 1,828 bytes            VGA Utilities
|       +---COMPUS~1     -> Occupies 5,468 bytes            CompuServe
|       +---MICROS~1     -> Occupies 1,635 bytes            Microsoft Office
|       +---UTILIT~1     -> Occupies 1,881 bytes            Utilities
|       +---LESSUS~1     -> Occupies 2,234 bytes            Less used utilities
|       +---WHIZNO~1     -> Occupies 716 bytes            WhizNotes
|       +---BORLAN~1.52  -> Occupies 11,652 bytes ( 0.01 MB) Borland C++ 4.52
|       +---WINFAX       -> Occupies 261 bytes            WinFax
|       \---MICROS~2     -> Occupies 1,218 bytes            Microsoft Help Workshop
+---DESKTOP      -> Occupies 44,041 bytes ( 0.04 MB) Desktop
|   \---MYBRIE~1     -> Occupies 262 bytes            My Briefcase
+---PIF          -> Occupies 0 bytes            PIF
+---RECENT       -> Occupies 22,991 bytes ( 0.02 MB) Recent
+---SHELLNEW     -> Occupies 37,398 bytes ( 0.04 MB) ShellNew
+---SENDTO       -> Occupies 466 bytes            SendTo
\---FORMS        -> Occupies 0 bytes            FORMS


 Total free space on drive C: 13,979,648 bytes (  13.33 MB)
 Type "ShowSize ?" to see help and tips on command usage.