get-explicit-image-sizes.php

<?php
/**
 * Get explicit image sizes
 * 
 * @param string $image_url The image URL - https:// ...
 * 
 * @return string
 */
function get_explicit_image_sizes( $image_url ) {

    $img_explicit = '';

    if ( $image_url ) {
        $logo_media_id  = get_media_id_from_url( $image_url );
        $img_dimensions = get_image_sizes_by_id( $logo_media_id );
        
        if ( $img_dimensions ) {
            $img_explicit = ' width="' . $img_dimensions['width'] . '" height="' . $img_dimensions['height'] . '" ';
        }        
    }

    return $img_explicit;
}