Bootstrap form example
HTML
<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.0.1/css/bootstrap.min.css">
<h3> The image should be a square.. </h3>
<img src='//placehold.it/200x200' />
<img class='img-circle' src='//placehold.it/200x200' />
<hr>
<img src='//placehold.it/200x100/FF0000' />
<img class='img-circle' src='//placehold.it/200x100/FF0000' />
<hr>
<img src='//placehold.it/100x200/0000FF' />
<img class='img-circle' src='//placehold.it/100x200/0000FF' />