Add specific thumbnail size to theme file

Hi,

I have
add_image_size ( ‘Small Thumbnail’, 60, 60, false );

and I want to call it using the following:

if ( $the_query->have_posts() ) {
            echo '<ul class="recipes-list">';
            while ( $the_query->have_posts() ) {
                $the_query->the_post();
                echo '<li class="clearfix">';
                $url = wp_get_attachment_url( get_post_thumbnail_id($post->ID) );

                if($url == "")
                {
                    $url = site_url().'/wp-content/uploads/2015/09/noimage.png';
                }

                echo '<a href="'.get_permalink($post->ID).'"><img src="'.$url.'" height="60" width="60"/></a>';
                echo '<article>';
                echo '<h3><a href="'.get_permalink($post->ID).'">'.get_the_title().'</a></h3>';
                ?>

I would really appreciate any help.