Bootstrap CSS for Glyphicons does not have classes for the stack. You can apply the classes from your sample code: http://bootply.com/88775
CSS
.icon-stack { display: inline-block; height: 2em; line-height: 2em; position: relative; vertical-align: -35%; width: 2em; } .icon-stack .icon-stack-base { font-size: 2em; } .icon-stack [class^="icon-"], .icon-stack [class*=" icon-"] { display: block; font-size: 1em; height: 100%; line-height: inherit; position: absolute; text-align: center; width: 100%; } .icon-stack .glyphicon{ font-size: 2em; } .glyphicon-ban-circle { color:red; }
HTML
<span class="icon-stack"> <i class="glyphicon glyphicon-phone icon-stack-base"></i> <i class="glyphicon glyphicon-ban-circle"></i> </span>
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