After installing Size Chart Pro, go to Online Store > Themes > Customize. Open a product page template, then add the Size Chart Pro block: click "Add block", find "Apps", and select "Size Chart Pro". Place the block where you want the size chart to appear (typically near the size selector or product description). Save your changes. The chart will only appear on products that have size measurement data in their variant metafields.

The size chart appears only when your product has measurement data. This data is stored in product variant metafields. Ensure you have run the metafield setup in the Size Chart Pro app (Setup page) and that your variants have values for at least one measurement field (e.g. Waist, Length, Chest) in either cm or inches. If your product has no size variants or no measurement metafields populated, the block will not display a chart. Use the "Skip and sync all" option if you are using a feed or bulk import to populate metafields later.

Use the Custom Labels page in the Size Chart Pro app. There you can enter optional custom labels for each measurement field (e.g. Waist, Length, Bust). These labels replace the default table headers in your size charts. Leave a field blank to keep the default label. Save your changes and the updated labels will appear on your storefront.

Yes. Size Chart Pro supports a unit selector (cm/inches) when you have both metric and imperial data for the same measurement types on your variants. For example, if you populate waist_cm and waist_in on your variants, customers will see a toggle to switch between units. Populate the corresponding metafields (e.g. *_cm and *_in) for the measurements you want to offer in both units.

The size chart data comes from product variant metafields. Size Chart Pro installs metafield definitions (e.g. custom_variant.waist_cm, custom_variant.length_cm) when you run the setup. You then need to populate these metafields for each variant, either manually in Shopify Admin, via a bulk import/CSV, or through a product feed/integration. The app reads the values from your variants and renders them as a table. It does not create or manage the data itself—you control the source and values.