If your size chart is published, assigned to a collection, and the app block is on your product template — but the chart still doesn't appear — the collection you're using as a matching condition may not be published on your storefront.
Kiwi uses Shopify's collection membership to match products to size charts. If a collection is unpublished, Shopify doesn't expose its membership to apps — so Kiwi can't match any products to it, even if the setup looks correct inside the app.
Symptoms
This issue is easy to miss because everything looks correctly configured inside Kiwi. Look for this specific combination:
Size chart is published ✓
Chart is assigned to a collection ✓
App block is added to the product template ✓
Custom injection selector is blank ✓
Chart doesn't appear on any product in that collection ✗
The key sign: the chart is missing on every product in the collection, not just some of them.
Option 1 — Publish the collection (recommended)
In your Shopify admin, go to Products → Collections.
Open the collection you're using as a matching condition in Kiwi.
Under Sales channels, make sure Online Store is checked.
Save the collection.
Open a product page from that collection and confirm the size chart now appears.
Publishing a collection doesn't mean it has to appear in your navigation menu. You can publish it so Shopify exposes its membership to apps, while keeping it out of your store's menus entirely.
Option 2 — Switch to a different matching condition
If you don't want to publish the collection, you can match the chart using product tags, type, or vendor instead — these don't require the collection to be published.
Open the size chart in Kiwi.
Go to Matching Conditions.
Remove the collection condition.
Add a condition using Product tag, Product type, or Product vendor that covers the same products.
Save the chart and test on a product page.
Which option is right for you?
Situation | Recommended fix |
The collection groups products for internal or operational reasons | Use tags, product type, or vendor instead |
The collection is a real storefront collection you haven't published yet | Publish it |
Products are hard to tag consistently and the collection already groups them correctly | Publish the collection |