display additional fields value in packing slips

[fredkh]

Hi,

How do I incorporate product weight and dimension details (accessible via metafields) into the packing slips for my Shopify orders?

also I applied following code , but it didn't work.

<span class="line-item-description-line">
{{ line_item.grams | weight_format }}
</span>

Br,

fredkh