Fix Size Chart Disappearing After Variant or Swatch Selection

This guide shows you how to fix a Kiwi size chart that disappears from the product page when a customer changes a variant option, size, color, style or a swatch, so the chart stays visible whichever variant is selected.

When the chart vanishes after a variant change, it is usually because your theme or your variant app re-draws the product form and removes the size chart element Kiwi added to the page.

This guide is for Shopify merchants and support teammates diagnosing a Kiwi size chart that disappears after a variant or swatch selection. It walks through the fastest reliable fix path: turning on Reinject, choosing a stable placement, and re-testing on the live storefront.

Enable reinject is available on every Kiwi plan, including Free, so the first fix below needs no upgrade.

App Block placement is not plan-gated either, it is available on every Kiwi plan. What it needs is a Shopify Online Store 2.0 theme.

Part of it does. Turning on Enable reinject works whatever your theme is, but the App Block placement described below needs a section that supports app blocks — Online Store 2.0 themes are where that support arrived, and the app block is the placement route Kiwi recommends. Theme version alone is not the answer, since Shopify decides app block support section by section. Where it is not available, Kiwi is loaded instead by the {% render 'kiwiSizing' %} snippet placed immediately before the closing </head> tag in theme.liquid, and placement is then handled entirely by the injection selector. That snippet route is not recommended, so only fall back to it if the app block is genuinely not an option.

To find out which you have: from the Shopify admin go to Online Store, click Edit theme, navigate to the product page and the section the chart belongs in, then click Add block in the sidebar. An Apps section in the block picker means that section supports app blocks and App Block placement is open to you; no Apps section means it does not, and you are on the snippet route.

If the Kiwi size chart is visible when the product page loads but disappears as soon as a customer picks a variant or swatch, the likely cause is that your variant app or theme re-draws the product page content and removes the size chart Kiwi injected.

Fastest next check: turn on Enable reinject in Kiwi and retest on your live storefront, see "How do I stop the Kiwi size chart disappearing when a customer picks a variant?" below.

If the Kiwi size chart shows for some variants of a product and not for others, the likely cause is that the chart is placed inside a container that the variant app rebuilds when the selection changes.

Fastest next check: move the size chart placement outside any block that is re-drawn on a variant change, see "Where should I place the Kiwi size chart so it survives a variant change?" below.

If the Kiwi size chart appears twice, or moves to a different spot on the product page after a variant change, the likely cause is that the placement selector targets elements that are recreated each time the variant changes.

Fastest next check: use a stable parent selector, or use Kiwi App Block placement instead, see "Where should I place the Kiwi size chart so it survives a variant change?" below.

Turning on Enable reinject in Kiwi is the first fix to try. It is the fastest route for a size chart that vanishes after a size, color, style or swatch selection.

Directly below that toggle is CSS selector of parent container to observe, a text field of up to 100 characters that takes a selector such as main.

On the retest, the size chart should remain visible and in the correct position every time you switch variant. If it still disappears, the chart is probably placed inside a container your theme or variant app rebuilds, move it to a stable placement, as described in "Where should I place the Kiwi size chart so it survives a variant change?" below.

Where you put the Kiwi size chart decides whether it survives a variant change. When a variant app such as Swatch King is installed, a placement inside a variant-rendered container is fragile, because the app replaces that container every time the customer changes an option.

Placements that survive a variant change:

Placements that break on a variant change:

After turning on Enable reinject or moving the size chart placement, verify the fix on your live storefront.

If the size chart still vanishes on a variant change after you have worked through the Reinject and placement fixes, one of these is usually the reason:

To check the last one, and to turn it on: go to Sales channels → Online Store, click Edit theme on the theme that is live, and open the Products template, usually Default product. Click Add section, or open an existing section and click Add block, then switch to the Apps tab and choose Kiwi Sizing under Kiwi Size Chart & Recommender. Click Save. If the block is already in the template, it is enabled.

Check every product template you use, not only Default product. A store with custom product templates needs Kiwi Sizing added to each one, and a template that was missed produces exactly this pattern: the chart behaves on some products and is absent on others.

If the size chart still disappears after you have turned on Enable reinject and moved the placement outside the variant container, send the following to support so they can reproduce it:

If you are looking for a swatch solution and do not already have one, Kiwi's own team builds a free option: Kiwi Product Variants & Swatches. Because it is made by the same team as Kiwi Sizing, the two work together out of the box with no extra setup. It supports visual swatches for color, image and button styles among others, plus automatic variant image updates, sold-out variant handling, and fully customizable swatch styling.

You can install it for free from the Kiwi Product Variants & Swatches listing on the Shopify App Store.