Wordpress Gutenberg Editor Font Size

//********************************************************************************
// Change text size of Gutenberg editor
// https://studiopress.blog/block-font-sizes/
//********************************************************************************

// Adds support for editor font sizes.
// Do NOT include the opening php tag.

add_theme_support( 'editor-font-sizes', array(
	array(
		'name'      => __( 'small', 'vuesource' ),
		'shortName' => __( 'S', 'vuesource' ),
		'size'      => 12,
		'slug'      => 'small'
	),
	array(
		'name'      => __( 'regular', 'vuesource' ),
		'shortName' => __( 'M', 'vuesource' ),
		'size'      => 16,
		'slug'      => 'regular'
	),
	array(
		'name'      => __( 'large', 'vuesource' ),
		'shortName' => __( 'L', 'vuesource' ),
		'size'      => 20,
		'slug'      => 'large'
	),
	array(
		'name'      => __( 'larger', 'vuesource' ),
		'shortName' => __( 'XL', 'vuesource' ),
		'size'      => 24,
		'slug'      => 'larger'
	)
) );