Some customers are unsure of the size of the SQL database for Veeam Reporter.
This is because everyone's environment is different, and the database size can change drastically depending on the objects and metrics being collected.
Veeam offers a DB Sizing Calculator for Reporter to help determine the approximate size of the SQL database. Refer to the download file below:
http://veeampdf.s3.amazonaws.com/guide/reporter-db-sizing-calculator.zip