app/assets/stylesheets/font-awesome/_larger.scss
// Icon Sizes// ------------------------- /* makes the font 33% larger relative to the icon container */.#{$fa-css-prefix}-lg { font-size: (4em / 3); line-height: (3em / 4); vertical-align: -15%;}.#{$fa-css-prefix}-2x { font-size: 2em; }.#{$fa-css-prefix}-3x { font-size: 3em; }.#{$fa-css-prefix}-4x { font-size: 4em; }.#{$fa-css-prefix}-5x { font-size: 5em; }