filament/packages/support/resources/css/components/icon.css

.fi-icon {
    @apply size-5;

    &.fi-size-xs {
        @apply size-3;
    }

    &.fi-size-sm {
        @apply size-4;
    }

    &.fi-size-md {
        @apply size-5;
    }

    &.fi-size-lg {
        @apply size-6;
    }

    &.fi-size-xl {
        @apply size-7;
    }

    &.fi-size-2xl {
        @apply size-8;
    }
}