# Gallery thumbnails plus a higher sticky CTA: +7.17% conversion

- Outcome: Won
- Page type: Product page (Ecommerce)
- Elements: Product images & gallery, Sticky add-to-cart bars
- Test run by: [Blend Commerce](https://liftarchive.com/practitioners/blend-commerce/)
- Commentary by: LiftArchive (our analysis, not theirs)
- Original source: https://blendcommerce.com/blogs/ab-tests-shopify/7-17-increase-in-conversion-rate
- Page: https://liftarchive.com/test/sports-nutrition-thumbnails-plus-sticky-cta/

Showing image thumbnails in the product gallery, together with a sticky add-to-cart button placed higher on the page, lifted conversion rate by 7.17% for a sports nutrition brand's Ireland site. Blend Commerce ran this two-week A/B test. Both changes shipped together, so the result can't be credited to either one alone.

## Result

**+7.17% conversion**

- Conversion rate: +7.17%.
- Revenue per visitor: +6.26%.
- Add-to-cart clicks: +9.61%.
- Sticky CTA clicks: +35.07%, which suggests the sticky button did much of the work.

## Control

The product gallery had no thumbnails. The sticky add-to-cart button only appeared after shoppers scrolled down.

## Variant

Thumbnails were shown under the gallery, and the sticky add-to-cart button was placed higher so it showed sooner.

## Why it likely won (our reading)

- An earlier test on the same Ireland site added thumbnails alone and lost. The team's reading was that thumbnails took up space and pushed the buy options down.
- Moving the sticky button up kept the add-to-cart action in reach while thumbnails used more room.
- The big jump in sticky CTA clicks points to easier access to the button as a key driver.

## Caveats

This was a bundled test of two changes, so neither can be credited alone. It ran for two weeks on the Ireland site only, and significance and sample size were not shared.

## How to run this test

- Hypothesis: If we show gallery thumbnails and keep a sticky add-to-cart button visible early, then conversion will rise because shoppers can browse images without losing sight of the buy button.
- Primary metric: Conversion rate
- Guardrail: Add-to-cart rate
- Guardrail: Revenue per visitor
- Guardrail: Mobile vs desktop conversion
- Who should test it: Stores whose product pages have several images and buy options that sit low on the page. If your buy button is already high and visible, the sticky change may add little.

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Credit: Blend Commerce ran this test and owns the result. Summary and commentary by LiftArchive (https://liftarchive.com/test/sports-nutrition-thumbnails-plus-sticky-cta/).
Usage: Free to use, quote and build on, with credit and a link: name the practitioner or organization that ran the test and link to its LiftArchive page. The results belong to the practitioners who ran and shared them; the summaries and commentary are LiftArchive's.