How to enable Google Analytics for Size Chart?
You can enable Google Analytics for Size Chart. By this, admin can track Size chart events in GA reports including Click Button and Impression information.
At the Settings > Step 5: Google Analytics Settings section, then check on Enable Google Analytics to activate it.
If you haven't configure Google Analytics, follow the guide below:
https://help.shopify.com/en/manual/reports-and-analytics/google-analytics/google-analytics-setup