You can print on paper sizes not listed in the Page Size drop-down menu (8" x 10" for example) by creating custom sizes in inches or millimeters. 8.50 x 26.61 inches / 215.9 x 676.0 mm (Rear Tray) 8.50 x 11 .69 inches / 215.9 x 297.0 mm (Cassette) Click 'OK'.