There are three sizes of photographs used in applications:  immigration, citizenship, and passport.

Note:  photographs that do not perfectly comply with government instructions may result in your application suffering processing delays.  The most common errors are wrong sizes and backgrounds that are not white.

For immigration sized photographs, please follow the instructions at: http://www.cic.gc.ca/english/information/applications/photospecs.asp#brochure.

For citizenship sized photographs, please follow the instructions at: http://www.cic.gc.ca/english/pdf/kits/citizen/CIT0021E.pdf

For passport sized photographs, please follow the instructions at:  http://www.ppt.gc.ca/cdn/photos.aspx?lang=eng