I need to find out the size of all the objects in the database.The size should include all the objects (tables, indexes etc) .
Let me know how to find out the size and if there is any query to find the size.
I don't think OP was trying to find out a formula for the tablespace size. More like, what is currently occupied space by a table and associated objects (indexes etc.) all together.
Could you explain more about your question? An example would be great.