On desktop collection pages, hovering over a product card showed size buttons that added the item straight to the cart. See how 13,432 desktop visitors responded.
Hover Size Buttons on Desktop Collection Pages Make No Clear Difference to Conversion Rate


If product cards show sizes on hover, then add-to-cart rate will rise on collection pages, lifting average order value and conversion rate, because shoppers are prompted to add to cart without opening the product page.
What We Changed
- Showed size buttons on each product card when hovered on desktop collection pages.
- Added the selected size to the cart with one click.
- Showed out-of-stock sizes as disabled.
- Made no changes on mobile.
The Results
How the new version compared with the original, across all devices.
Conversion rate
Add-to-cart rate
Orders
Key Learnings
- Conversion rate, the main metric, didn't move (0.0%), with a 50.9% probability that the variant beats the original.
- Add-to-cart rate rose 29.7% and bounce rate fell 21.6%, so shoppers did use the buttons.
- The extra adds didn't become orders: orders fell 3.5% and revenue per visitor 10.4%.
Detailed results breakdown
Conversion rate
+0.0%
Add-to-cart rate
+29.7%
Orders
-3.5%
Revenue per visitor
-10.4%
Bounce rate
-21.6%
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Other experiments we've run

Product Page (PDP)
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+21.0% Conversion rate

Collection Page (PLP)
Inconclusive
New Collection Page Filters Make No Clear Difference to Conversion Rate
Collection pages got a reworked filtering system with more ways to narrow down products. See how it played out on desktop and mobile.
-1.0% Conversion rate

Other
Positive signal
Moving the Chat Pop-Up Away From Key Buttons Shows a 44.5% Conversion Rate Lift
The chat pop-up moved so it no longer covered add-to-cart, cart or checkout buttons on mobile and desktop. See what happened across 30,122 visitors.
+44.5% Conversion rate
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