We can find these by looking at Bootstrap's stylesheet, Bootstrap.css. Each \{number} represents a hexadecimal value, so \2a is equal to 0x2a or *. As for the font, that can be downloaded from http://glyphicons.com. .glyphicon-asterisk:before { content: "\2a"; } .glyphicon-plus:before { content: "\2b"; } .glyphicon-euro:before { content: "\20ac"; } .glyphicon-minus:before { content: "\2212";