One-click size buttons on collection cards: 0% conversion change
Test run byClean CommitCRO agency
Commentary byLiftArchiveOur analysis, not theirsShowing one-click size buttons on desktop product cards raised add-to-cart rate 29.7% but left conversion rate flat at 0.0%.
Clean Commit ran this test for an anonymized Shopify store on 13,432 desktop visitors.
Orders fell 3.5% and revenue per visitor 10.4%, so the extra adds did not become sales.
- Conversion rate did not move (0.0%), with a 50.9% probability to beat control.
- Add-to-cart rate rose 29.7% and bounce rate fell 21.6%, so shoppers used the buttons.
- Orders fell 3.5% and revenue per visitor fell 10.4%. Both are negative.
- More adds to cart did not lead to more orders.
The change
On desktop, the variant shows one-click size buttons on product card hover.
Simplified mockup drawn by LiftArchive from the shared screenshots.
Control
Desktop product cards on collection pages had no quick-add option. Shoppers opened the product page to pick a size.
Variant
Hovering over a product card on desktop showed size buttons that added that size to the cart in one click, with out-of-stock sizes disabled. Mobile stayed the same.
Why it likely came out this way
Our reading of the result, not the practitioner's claim.
- One-click adds are easy, so shoppers may add items casually and drop them later.
- Skipping the product page means skipping photos, details and reviews that help people commit to buying.
- Shoppers who would have browsed several product pages may have added one item and stopped, which could explain lower revenue.
Caveats: Desktop only, on 13,432 visitors; duration was not shared. No metric showed a clear result on conversion.
Who ran it
Clean Commit ran this test for a Shopify store (anonymized) and published the results (Clean Commit A/B test library). The numbers are theirs; the summary and commentary on this page are ours.
Read the original case study on Clean Commit →
How to run this test on your store
- Hypothesis
- If we show size buttons on product cards when hovered, then more shoppers will add to cart and buy because they don't need to open the product page.
- Primary metric
- Conversion rate
- Guardrails
- Orders
- Revenue per visitor
- Average order value
- Who should test it
- Apparel stores with repeat buyers who already know their size and the product. For new shoppers or products that need photos and reviews to sell, quick-add may raise adds without raising orders, as it did here.
Questions
Does quick add on collection pages increase sales?
Not in this test. Add-to-cart rose 29.7%, but conversion was flat and revenue per visitor fell 10.4%.
Why would more add-to-carts not lead to more orders?
Easy adds can be casual. Without seeing the full product page, shoppers may feel less sure and abandon the cart.
Should out-of-stock sizes show on quick-add buttons?
This store showed them as disabled, so shoppers could see what was missing without clicking. That avoids a dead-end click.
Similar tests
@oliverkenyon@oliverkenyon@oliverkenyon@oliverkenyon@oliverkenyon@oliverkenyon