What is the Database version?
If SQL.
You can do the below + your repository Size.
1.Get the Schema Name of tha project.
2. Go to the DataBase Server and open SQL Server Managment Studio.
3. Open the Database folder and look for the relevant Schema name.
4. right click on the database and click on properties.
If Oracle:
Get in Touch with your DBA for the schema size and add your Repository Size to get the full size of the project.