Hi Dukewes,
Actually feedzy uses the images contained within the feed’s items. That’s why you can’t specify the size of them.
Nevertheless, if you are administrator of the site where you’re picking the feed, you can add this short function in it functions.php file :
function bweb_feedzy_insert_thumbnail_RSS( $content ) {
global $post;
if ( has_post_thumbnail( $post->ID ) ){
$content = '' . get_the_post_thumbnail( $post->ID, 'medium' ) . '' . $content;
}
return $content;
}
add_filter( 'the_excerpt_rss', 'bweb_feedzy_insert_thumbnail_RSS' );
add_filter( 'the_content_feed', 'bweb_feedzy_insert_thumbnail_RSS' );
Regards