Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.10)
// Compass (v1.0.0.alpha.20)
// ----

$genericons:(
  up: up,
  down: down
);

%genericons {
  font-family: Genericons;
  font-weight: normal;
  font-size: 20px;
}

@mixin genericons($icon, $size: 1){
  content: '#{map-get($genericons, $icon)}';
  @if $size != 1 {
    font-size: 20px * $size;
  }
  @extend %genericons;
}

.standard:before {
  @include genericons(up);
}

.double:before {
  @include genericons(up, 2);
}

SassMeister-output.css

.standard:before, .double:before {
  font-family: Genericons;
  font-weight: normal;
  font-size: 20px;
}

.standard:before {
  content: "up";
}

.double:before {
  content: "up";
  font-size: 40px;
}