# How do I add a size chart?

The theme supports a built-in size chart feature that can be linked to your product options. To activate it:

* Create a metafield for the Size chart following the setup guide provided [here](https://nextsky.gitbook.io/purity-theme/theme-installation/create-required-metafields/metafields/size-chart).
* In your **Product page** template, go to **Product information → Variant picker → Size trigger**.
* Enter the option name you use for sizing (for example: Size).

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After these steps, the size chart will automatically appear on all product pages that use the defined size option names.