Polylang flag size again

I changed polylang flags with new one and it shows correctly, but I don’t know how to change size.
I found this on Polylang site, but I don’t know how to implement:

add_filter( ‘pll_custom_flag’, ‘pll_custom_flag’, 10, 2 );

function pll_custom_flag( $flag, $code ) {
$flag[‘url’] = “http://mysite.com/wordpress/wp-content/polylang/{$code}.svg”;
$flag[‘width’] = 32;
$flag[‘height’] = 22;
return $flag;
}