If you are familiar with MySQL cli then you can query the information schema database and look for table sizes for your Newscoop database, something like this:
SELECT table_name AS "Table", table_rows AS "Rows Count", ROUND((data_length + index_length) / 1024, 2) AS "Size in Kb" FROM information_schema.TABLES WHERE information_schema.TABLES.table_schema = 'newscoop';
I am not a user of phpMyAdmin but I guess it can also give you this information.
You can save the output to some text file and attach it here so we can have a look.