functions.php

<?php

/**
 * Shared Counts, add a Big Block style
 * @see https://sharedcountsplugin.com/2019/05/13/creating-new-button-styles/
 *
 * @param array $styles
 * @return array 
 */
function be_shared_counts_styles( $styles ) {
	$styles['big-block'] = __( 'Big Block' );
  return $styles;
}
add_filter( 'shared_counts_styles', 'be_shared_counts_styles' );