Raven Scanner currently supports documents up to 35" in length for Pro Scanners and 19" in length for Original scanners, when using Extra Long page size mode. All Raven Scanners also support Auto, Letter and Legal page size modes for documents up to 14" in length.
Click here to learn more about enabling long page scanning.
For more information on how to adjust scan size via Raven Desktop, take a look here! If you have any further questions, our support team is happy to assist at 1-800-713-9009 or support@raven.com.