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How to trigger post-purchase emails based on product size

  • May 16, 2026
  • 2 replies
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  • Contributor I

I have one shoe product with various size variants. I want to create a post-purchase flow targeting customers who have ordered a specific size (Shopify). Currently I can only see the product name under the trigger filters (Dimension > Item > Dimension Value > Product) but I can’t seem to filter it further based on size ordered. Am I able to do that? Appreciate the help!

Best answer by ArpitBanjara

Hey ​@k_s 

Can you please try to use Ordered Product instead of Placed Order as your flow trigger. Placed Order fires once per transaction and bundles everything together, making it hard to branch by individual variant. Ordered Product fires once per line item, so it should carry the specific variant data (including size) you need to split on.

also before you build the above, you can go to “Metrics” section in klaviyo and find ordered product metric, click on ‘activity feed’, and see how the data is coming in. If you see that the “Size data” is coming in “ordered product event”, only then you should do what i suggested above.

 

Give this a try and let me know if it works for you. If something looks off or the variant property name doesn't match, drop a reply and we can dig into it together.

Cheers.

Arpit

2 replies

ArpitBanjara
Principal User II
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  • Principal User II
  • Answer
  • May 17, 2026

Hey ​@k_s 

Can you please try to use Ordered Product instead of Placed Order as your flow trigger. Placed Order fires once per transaction and bundles everything together, making it hard to branch by individual variant. Ordered Product fires once per line item, so it should carry the specific variant data (including size) you need to split on.

also before you build the above, you can go to “Metrics” section in klaviyo and find ordered product metric, click on ‘activity feed’, and see how the data is coming in. If you see that the “Size data” is coming in “ordered product event”, only then you should do what i suggested above.

 

Give this a try and let me know if it works for you. If something looks off or the variant property name doesn't match, drop a reply and we can dig into it together.

Cheers.

Arpit


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  • Author
  • Contributor I
  • May 18, 2026

Thank you so much - was able to do this!