Why is my printer not recognizing my paper size?

1. Check printer settings to ensure the correct and most up-to-date driver is installed.
2. Ensure that the paper type selected matches that which is being used in the tray.
3. Check the paper tray to make sure it contains the correct paper size.
4. Ensure that the appropriate paper size settings are selected in both printer software and application.
5. Make sure the paper guide is correctly adjusted to the size of the paper being used.
6. Call a service technician for further assistance if required.