Hello,
try this good tool:
http://www.iceteagroup.com/Products/SqlEngineer.htt
In the app. there is a funtionality to calculate the table
size or do it with the sql statement:
SELECT NAME, CREATOR, @ROUND(PAGECOUNT/1024,2) As Size
FROM SYSADM.SYSTABLES WHERE SYSTEM = 'N' AND TYPE =...