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A5 Premium Multi Purpose White Paper - 24 lb (90 GSM) | For Copy, Printing, Writing | 5.83" x 8.27" inches (148 x 210 mm - Half of A4) | Full ream of 250 Sheets - Walmart.com
Canon Knowledge Base - "The size or type of the paper loaded in the rear tray is different from the print settings. " is displayed