I have a dynamic product which is based on user size input. On the basis of user size input I am calculating product price and weight.

I already set the product calculated price in custom price field of quote and set additional_options with all user input as custom option.

I also have to calculate the weight of the product based on user input and want to use it for shipping calculation.

I am trying to set product calculated weight in quote item as weight, but it get changed when quote refreshed or any extra activity on quote.

How do I set product custom weight in quote and used it in shipping method ?

  • Were you able to find a resolution to this? We have the same need. – Brit Mansell Nov 9 '17 at 0:25

Magento 2 : use Plugin for Type : Magento\Quote\Model\Quote\Item

after method setProduct() which is a public method. setWeight('123') and return the results.

public function afterSetProduct(\Magento\Quote\Model\Quote\Item $item, $results){


    return $results;


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