@mixin generateSizes($value) {
  $calculated_value: $value * 100%;

  .icon-#{$value}-and-quarter-x {
    font-size: ($calculated_value + ($calculated_value / 4));
  }
  .icon-#{$value}-and-half-x {
    font-size: ($calculated_value + ($calculated_value / 2));
  }
  .icon-#{$value}x {
    font-size: $calculated_value;
  }
}

@include generateSizes(1);
@include generateSizes(2);
@include generateSizes(3);
@include generateSizes(4);

@mixin rotateIcon($value) {
  .icon-rotate-#{$value} {
    transform: rotate(#{$value}deg);
  }
}

@include rotateIcon(45);
@include rotateIcon(90);
@include rotateIcon(135);
@include rotateIcon(180);
@include rotateIcon(225);
@include rotateIcon(270);
@include rotateIcon(315);
@include rotateIcon(360);