How do you set the print size on a HP office jet 4200 printer?

Its an all in one printer.How do you set the print size on a HP office jet 4200 printer?
I set it with word.There is a setting in properties. Click on the icon on your control panel then click printer.Click on properties Then click on advanced tab then click printing defaults button. I have never used this.I just use words to change font size.I have hp 2400.