Colors
<i class="icon user primary"></i>
<i class="icon app secondary"></i>
<i class="icon bubbles positive"></i>
<i class="icon apple negative"></i>
Rounded
<i class="icon rounded user primary"></i>
<i class="icon rounded app secondary"></i>
<i class="icon rounded bubbles positive"></i>
<i class="icon rounded apple negative"></i>
Circular
<i class="icon circular user primary"></i>
<i class="icon circular app secondary"></i>
<i class="icon circular bubbles positive"></i>
<i class="icon circular apple negative"></i>
Inverted
<i class="icon inverted circular user primary"></i>
<i class="icon inverted circular app secondary"></i>
<i class="icon inverted circular bubbles positive"></i>
<i class="icon inverted circular apple negative"></i>
Size
<i class="icon user small"></i>
<i class="icon app large"></i>
<i class="icon bubbles big"></i>
<i class="icon apple huge"></i>