database size limitations
Database size is limited in the express edition only. In other editions the size is limited only to your storage subsystem restrictions. If it is not express edition, ask your client if it is the full transaction log file issue which he is interpreting as a database size limitation. In that case you either need to back up the log files or increase log file size or truncate the log file with dbcc, depending on your database environment, storage subsystem and recovery model.