Canon Knowledge Base - Setting Paper Size in Printer Driver
Canon Knowledge Base - Approximate print sizes printable based on resolution for the PowerShot A495.
Amazon.com: Canon PIXMA PRO-100 Professional Inkjet Photo Printer, 4800x2400 Resolution, WiFi, 13x19" Max Paper Size - With Canon LU-101 Pro Luster Photo Paper (13x19"), 50 Sheets : Office Products