get_the_post_thumbnail( $post_id ); // Resolución Original get_the_post_thumbnail( $post_id, 'thumbnail' ); // Thumbnail get_the_post_thumbnail( $post_id, 'medium' ); // Resolución mediana get_the_post_thumbnail( $post_id, 'large' ); // Resolución Grande get_the_post_thumbnail( $post_id, 'full' ); // Resolución Original get_the_post_thumbnail( $post_id, array( 100, 100) ); // Otras resoluciones