Hello,
We have double-check and our dev team suggests this code:
$tables = array(
array( 'Size', 'UK', 'US', 'EU', 'Japan' ),
array( 'XS', '6 - 8', '4', '34', '7' ),
array( 'S', '8 -10', '6', '36', '9' ),
array( 'M', '10 - 12', '8', '38', '11' ),
array( 'L', '12 - 14', '10', '40', '13' ),
array( 'XL', '14 - 16', '12', '42', '15' ),
array( 'XXL', '16 - 28', '14', '44', '17' )
);
update_post_meta( $post_id, 'woodmart_sguide', $tables );
Please add it into the functions.php of the child theme. You can change it as per your needs.
Best Regards