Here are some steps to help solve the printer paper size issue:
Check the printer settings and make sure the paper size is set correctly.
Make sure the paper tray is loaded with paper of the size that is selected.
Check the print driver settings and ensure the right size is selected.
Ensure that the paper size in the document is the same as the paper size in the printer settings.
Print a test page to check if the printer is using the correct paper size.
