Using Shopify Tags in a Template

Hi guys,

I've got a tricky use-case where essentially we're tagging customers using the Shopify Tags field with a "before" and "after" size after they take a quiz.

E.g.
Before Size: 10
After Size: 12

Syncs to Klaviyo fine - but I'm wondering how to extract a particular tag?

e.g. loop through the tags, and if a tag contains “Before Size” or “After Size”, extract it.

Once we extract the tag, can use a slice filter, I assume, to remove the "Before Size:" bit?

The tag may not always be in a fixed position in the index/array of tags, either - so can’t use a hardcoded index number.

Any advice welcome!