<a href="https://en.wikipedia.org/wiki/ISO_216#The_A_series" class="extiw" title="en:ISO 216">A4</a> paper aspect ratio (210:297) cropped portrait.
Jan Leineberg (photo), <a href="//commons.wikimedia.org/wiki/User:Hydrox" title="User:Hydrox">User:Hydrox</a> (cropping)
2007
<a href="//commons.wikimedia.org/wiki/File:Iso_Paja_017.jpg" title="File:Iso Paja 017.jpg">File:Iso Paja 017.jpg</a>