Use this guide when a SmartSize button does not appear on a product page where you expect it.
Why isn't my SmartSize button showing?
The missing button may be:
the Size Chart button for a size chart
the Find my size button for a fit quiz
both buttons on the same product page
Before you start
Know which button should appear on the product you are testing. If you are not sure whether the product matches a size chart or a fit quiz, check the product display rules for the chart or quiz in SmartSize.
Open the product page on your live storefront, not in the theme editor preview. Refresh the page at least once after making any changes.
=== "Size Chart button is missing"
Use this section when the **Size Chart** button is the only button missing.## Quick checks### 1. Check that the Size chart app extension is activeSmartSize uses the **Size chart extension** to show the **Size Chart** button on product pages.From the SmartSize Home page, open the **App extensions** card.If the **Size chart extension** is **Inactive**, turn it on in your live Shopify theme.After turning it on, return to SmartSize and confirm the extension shows **Active**.For step-by-step instructions, see [Turn on the SmartSize app extensions](../storefront-setup/turn-on-app-extensions.md).### 2. Check that the size chart is ActiveA size chart in **Draft** is hidden from shoppers.In SmartSize, go to **Size charts** and open the chart that should appear on this product. Make sure **Status** is set to **Active**, then save.### 3. Check that the product matches the display rulesOpen the size chart and review **Product display rules**. Confirm the product you are testing appears in the matching product list.If the product is missing, update the display rules. For a quick test, select the exact product and save.### 4. Check button placement after a theme changeIf you recently changed or updated your Shopify theme, automatic button placement may no longer find the right spot.Go to **Global settings** > **Button placement** and check whether SmartSize shows a warning about automatic placement.If automatic placement is not working, switch to another method:- **Floating button** — appears as a tab or widget on the product page. - **App block placement** — place the button manually in the Shopify theme editor.For placement options, see [Choose where the SmartSize button appears](../storefront-setup/button-placement.md).---
=== "Find my size button is missing"
Use this section when the **Find my size** button is the only button missing.## Quick checks### 1. Confirm your plan includes fit quizzesFit quizzes are available on Pro plans. If you are on Free, Starter, or Growth, fit quizzes are not enabled.In SmartSize, go to **Settings** > **Plans** and check your current plan.If your plan does not include fit quizzes, upgrade to Pro to enable the feature. For details, see [SmartSize plans and feature limits](../billing/plans-and-limits.md).### 2. Check that the Fit quiz app extension is activeSmartSize uses the **Fit quiz extension** to show the **Find my size** button on product pages.From the SmartSize Home page, open the **App extensions** card.If the **Fit quiz extension** is **Inactive**, turn it on in your live Shopify theme.After turning it on, return to SmartSize and confirm the extension shows **Active**.For step-by-step instructions, see [Turn on the SmartSize app extensions](../storefront-setup/turn-on-app-extensions.md).### 3. Check that the fit quiz is ActiveA fit quiz in **Draft** is hidden from shoppers.In SmartSize, go to **Fit quizzes** and open the quiz that should appear on this product. Make sure **Status** is set to **Active**, then save.### 4. Check that the product matches the display rulesOpen the fit quiz and review **Product display rules**. Confirm the product you are testing appears in the matching product list.If the product is missing, update the display rules. For a quick test, select the exact product and save.### 5. Check button placement after a theme changeIf you recently changed your Shopify theme, automatic placement may no longer work.Go to **Global settings** > **Button placement** and switch to **Floating button** or **App block placement** if you see an automatic placement warning.For placement options, see [Choose where the SmartSize button appears](../storefront-setup/button-placement.md).---
=== "Neither button shows"
Use this section when **no SmartSize button appears at all** on a product page where you expect one.## Quick checks### 1. Check that the app extension is activeSmartSize uses app extensions to show buttons on your storefront.From the SmartSize Home page, open the **App extensions** card and check the status for:- **Size chart extension** - **Fit quiz extension**If the extension you need is **Inactive**, turn it on in your Shopify theme editor. Save the theme, return to SmartSize, and confirm the status shows **Active**.For detailed steps, see [Turn on the SmartSize app extensions](../storefront-setup/turn-on-app-extensions.md).### 2. Check that the chart or quiz is ActiveA size chart or fit quiz in **Draft** is not shown to shoppers.Open the chart or quiz and check the **Status** field. If it is ready, change the status to **Active** and click **Save**.### 3. Check that the product matches the display rulesA chart or quiz only appears on products that match its **Product display rules**.Open the chart or quiz and review the matching product list. Confirm that the product you are testing appears in the list.If the product is missing, update the display rules. For a first test, select one exact product instead of a broad collection or tag.### 4. Check if the theme structure prevents automatic placementSome Shopify themes use product page sections or custom components that make automatic button placement difficult. SmartSize may show a warning when it cannot find a stable automatic selector.If automatic placement is not working, try:- **Floating button** — shows the button as a floating tab or widget on the product page. - **App block placement** — lets you place the button manually in the Shopify theme editor.For placement options, see [Choose where the SmartSize button appears](../storefront-setup/button-placement.md).### 5. Check if you saved a draft theme instead of the live themeChanges made in a draft or development theme do not affect the live storefront.If you turned on the app embed in a draft theme, the extension may still be inactive on the live storefront. Open the live theme in Shopify and turn on the app embed there.---
Causes and fixes summary
Cause | What happens | Fix |
App extension is inactive | Shopify is not loading the SmartSize button | Turn on the correct extension in your live theme |
Chart or quiz is in Draft | SmartSize hides it from shoppers | Change status to Active and save |
Product does not match display rules | The chart or quiz is active, but not for this product | Add the product to the display rules |
Theme change broke automatic placement | The button spot no longer exists in the new theme | Switch to floating button or app block placement |
Changes were not saved | The storefront keeps the previous version | Save in SmartSize or Shopify, then refresh |
Only one extension was turned on | Size chart and fit quiz use separate extensions | Turn on the extension for each feature you use |
Saved in draft theme | Shoppers still see the old theme | Enable the embed in the live theme, not a draft |
Plan does not include fit quizzes | Fit quizzes are a Pro feature | Upgrade to the Pro plan |
Check the result
After making changes:
Click Save in SmartSize or Shopify, depending on where you made the change.
Open the matching product page on your storefront.
Refresh the page.
Confirm that the correct button appears: - Size Chart for a size chart - Find my size for a fit quiz
If it still does not work
Contact SmartSize support and include:
the product URL where the button is missing
the name of the size chart or fit quiz that should appear
a screenshot of the App extensions status
a screenshot of the product display rules
your Shopify theme name
This helps support check whether the issue is caused by setup, product matching, or the theme structure.