What are the minimum and maximum custom paper sizes supported by the HP LaserJet CP1020?
The minimum custom paper size is 76 x 127 mm and the maximum is 216 x 356 mm. When specifying custom sizes in the printer driver, always set the short edge of the paper as the width and the long edge as the length. Paper should always be loaded short edge first.
From the official HP Laserjet Cp1020 Color Printer manual, page 51
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