Is it possible to make Font Awesome icons larger than 'fa-5x'?

Font awesome is just a font so you can use the font size attribute in your CSS to change the size of the icon.

So you can just add a class to the icon like this:

.big-icon {
    font-size: 32px;
}

Alternatively you can edit the source and create your own incrementations

FontAwesome 5

https://github.com/FortAwesome/Font-Awesome/blob/5.15.4/less/_larger.less

// Icon Sizes
// -------------------------

.larger(@factor) when (@factor > 0) {
  .larger((@factor - 1));

  .@{fa-css-prefix}-@{factor}x {
    font-size: (@factor * 1em);
  }
}

/* makes the font 33% larger relative to the icon container */
.@{fa-css-prefix}-lg {
  font-size: (4em / 3);
  line-height: (3em / 4);
  vertical-align: -.0667em;
}

.@{fa-css-prefix}-xs {
  font-size: .75em;
}

.@{fa-css-prefix}-sm {
  font-size: .875em;
}

// Change the number below to create your own incrementations
// This currently creates classes .fa-1x - .fa-10x
.larger(10);

FontAwesome 4

https://github.com/FortAwesome/Font-Awesome/blob/v4.7.0/less/larger.less

// 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; }

// Your custom sizes
.@{fa-css-prefix}-6x { font-size: 6em; }
.@{fa-css-prefix}-7x { font-size: 7em; }
.@{fa-css-prefix}-8x { font-size: 8em; }

1. Just add the font awesome class like this:

   class="fa fa-plus-circle fa-3x"
   

   (You can increase the size as per 5x, 7x, 9x..)

2. You can also add custom CSS.

You can redefine/overwrite the default font-awesome sizes and also add you own sizes

.fa-1x{
    font-size:0.8em;
}
.fa-2x{
    font-size:1em;
}
.fa-3x{
    font-size:1.2em;
}
.fa-4x{
    font-size:1.4em;
}
.fa-5x{
    font-size:1.6em;
}
.fa-mycustomx{
    font-size:3.2em;
}