PostNord - Papersize depending on Shipping method

functions.php

<?php
/**
 * @snippet       WooCommerce - Sets size of shippinglabel to LETTER for certain orders and LABEL for certain
 * @author        Redlight Media AB / Christopher Hedqvist
 * @compatible    WooCommerce 7.2.0
 */
function redlight_postnord_papersize( $papersize, $order ) {
  $shipping_method = $order->get_shipping_method();
  if( in_array( $shipping_method, array( 'Ombud', 'Hemleverans' ) ) ){
    $papersize = 'LABEL';
  }
  
  if( in_array( $shipping_method, array( 'Varubrev' ) ) ){
    $papersize = 'LETTER';
  }
  
  return $papersize;
}
add_filter('redlight_wcpns_get_label_papersize', 'redlight_postnord_papersize', 10, 2 );