display image size and weights in media library screen

if you are satisfied with w x h info there is a little snippet for child-theme functions.php:

function wh_column( $cols ) {
    $cols["dimensions"] = "Dimensions (w, h)";
    return $cols;
}
function wh_value( $column_name, $id ) {
    $meta = wp_get_attachment_metadata($id);
           if(isset($meta['width']))
           echo $meta['width'].' x '.$meta['height'];
}
add_filter( 'manage_media_columns', 'wh_column' );
add_action( 'manage_media_custom_column', 'wh_value', 10, 2 );

you can see then in list-view the width and height of the images

or if you like to have file-size aswell and dimensions:

delete the above snippet and add:

add_filter( 'manage_media_columns', 'media_columns_filesize' );
function media_columns_filesize( $posts_columns ) {
	$posts_columns['filesize'] = "File Size";
	$posts_columns["dimensions"] = "Dimensions (w, h)";
	return $posts_columns;
}

add_action( 'manage_media_custom_column', 'media_custom_column_filesize', 10, 2 );
function media_custom_column_filesize( $column_name, $post_id ) {
	if ( 'filesize' !== $column_name ) {return;}
	$bytes = filesize( get_attached_file( $post_id ) );
	echo size_format( $bytes, 2 );
}

add_action( 'admin_print_styles-upload.php', 'filesize_column_filesize' );
function filesize_column_filesize() {
	echo'<style>#filesize.column-filesize {width: 10%;}</style>';}

add_action( 'manage_media_custom_column', 'wh_value', 10, 2 );
function wh_value( $column_name, $post_id ) {	
	if ( 'dimensions' !== $column_name ) {return;}	
    $meta = wp_get_attachment_metadata($post_id);
           if(isset($meta['width'])){
           echo $meta['width'].' x '.$meta['height'];}
}