Size of a table containing Blob column

[tansdot]

Hi ,
I need to find out the Size of a table containing Blob column along with other columns. I am new to Blobs so Im not able to understand the concept of using dbms_lob.getlength to find this out.
My table Customers is as follows:

( Name varchar2(120),
Ord_dt Date,
Ord_summary Blob)

It contains 1000 records. Now how do I find out the size of this table ? Do I have to calculate the varchar and date column separate from the BLOB column ? Any help is appreciated.

Thanks

[davey23uk]

query dba_segments

select sum(bytes) from dba_segmets where table_name = 'CUSTOMERS'

[tansdot]

This is not the recommended way to calculate the size of the tables containing BLOB.
Thats what Im trying to find out.

[bkoniki]

If size of blob column cross 4k, then oracle store blob column separate from the parent table.

Hope this gives some idea

[tansdot]

NO this doesnt give any ideas. It doesnt answer the question.