# Hover size buttons on collection cards: +17.3% add-to-cart (flat)

- Outcome: Flat / inconclusive
- Page type: Collection page (Ecommerce)
- Elements: Product cards & quick add, Variant, size & option selectors
- Test run by: [Clean Commit](https://liftarchive.com/practitioners/clean-commit/)
- Commentary by: LiftArchive (our analysis, not theirs)
- Original source: https://cleancommit.io/ab-tests/desktop-collection-hover-sizing-buttons/
- Page: https://liftarchive.com/test/cc-desktop-collection-hover-sizing-buttons/

Showing clickable size buttons on hover on desktop collection cards raised add-to-cart rate by 17.3%, but revenue moved only 0.27%, so we treat the result as flat. Clean Commit ran this test for an anonymized Shopify store and published it in its A/B test library. The agency concluded there was no meaningful overall difference.

## Result

**+17.3% add-to-cart (flat)**

- Add-to-cart rate: +17.3%.
- Conversion rate: +6.5%, and orders: +5.2%.
- Average order value: -4.9%, a negative result.
- Revenue: +0.27%, effectively flat, because lower order value cancelled the extra orders.

## Control

Desktop product cards on collection pages with no way to add to cart directly.

## Variant

Size buttons from XS to XL appeared when shoppers hovered over a desktop product card, and clicking one added that size to the cart.

## Why it likely came out this way (our reading)

- Quick add removes a page view, so shoppers who already know their size act faster.
- Skipping the product page also skips upsells and extra details, which may explain the lower order value.
- Easy adds can include lower-intent clicks that never become orders.

## Caveats

The agency found no meaningful overall difference. It ran on an older page format, and sample size, duration and confidence were not shared. A separate run tested the same idea.

## How to run this test

- Hypothesis: If we show size buttons on hover on collection cards, then conversion rate will rise because shoppers can add to cart without opening each product page.
- Primary metric: Revenue per visitor
- Guardrail: Average order value
- Guardrail: Conversion rate
- Who should test it: Apparel stores with simple sizing and repeat buyers who know their fit. If your product pages sell add-ons or explain fit, quick add may cut order value.

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Credit: Clean Commit ran this test and owns the result. Summary and commentary by LiftArchive (https://liftarchive.com/test/cc-desktop-collection-hover-sizing-buttons/).
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.