How to get the total count of Favorite/Favorited authors

This will help you to show how many author current user favorite others:

Add this to your themes functions.php file

<?php
function get_fav_auth_count(){
    if ( is_user_logged_in() ) {
        global $current_user;
        wp_get_current_user();
        $count = size_of(get_user_option('favorite-authors', $current_user->ID));
        echo $count;
    }
}
?>

and call it like this <?php get_fav_auth_count(); ?>