mismatch is not only for size ,it could be for the paper Type and for the paer color too!
make sure the settings are same
make sure that you configured the width and the height correctly in both "PC,printer"
and also check the settings on the word too
Since a copple of day, the printer does not work wth the manual tray
Error message 03-450 paper mismatch
I use this mainly for printing envelops from word
The size in word and in the printer are the same
I have disinstalled the printer and the drivers, and re install from scratch with no success
Can you help me