![background image](https://i.printerdoc.net/HP LaserJet Pro 300 color Printer M351 series/en/HP LaserJet Pro 300 color Printer M351 series_en166.png)
Unexpected size in tray # Load <size> Press [OK]
Description
The product has detected paper in the tray that does not match the configuration for the tray.
Recommended action
Load the correct paper into the tray, or configure the tray for the size that you have loaded.