You set the status dropdown to Active, but it snaps back to Draft with a red message. This is by design: a size chart can only go live once it knows where to appear, so SmartSize blocks activation until the chart is linked to at least one product. The fix takes under a minute.
Why the chart stays on Draft
When you try to activate an unlinked chart, the editor shows: "To activate this size chart, link it to at least one product, collection, tag, type, or vendor." A red dot also appears on the link tab in the left sidebar, pointing you to the fix.
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Link the chart to at least one product
Click the link icon in the left sidebar to open Product display rules, then choose how to link the chart: Products, Collections, Types, Vendors, or Tags.
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For a single chart, Products is the quickest: tick the products that should show this chart and click Select.
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Set the status to Active
The rules panel now lists what you linked, and a matching products table confirms the chart has somewhere to appear. Open the status dropdown again and choose Active — it sticks this time. Finish with Save.
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💡 Tip: linked but still blocked? Check the matching products list at the bottom of the rules panel. If it says "No products match this combination", your rules are too narrow — remove or loosen a rule until at least one product matches, then set the chart to Active.