A/B test: put "Which size am I?" next to the size selector
If you put a link to the size guide right next to the size selector instead of at the bottom of the page, then you will get more orders, because doubt about the size stops the purchase exactly when people are choosing.
By Fernando Blanco Dosil · Updated November 2, 2026
Why it might work
The moment of greatest doubt on a clothing or footwear page is when "S M L XL" is staring at you. Does this brand run large or small? Am I a medium here? If the guide sits in the footer or in a tab nobody opens, people guess, or they don't choose at all.
A "Which size am I?" link just above or beside the sizes, opening the chart without leaving the page, puts the answer where the question is.
How to set it up
In Bixlow you describe the change to the agent, it builds it on your site and launches it as an A/B test once you approve it.
- Make sure your size guide is useful: measurements in centimetres and inches and, if you can, fit advice ("between two sizes? go up").
- In the variant, add the link right by the selector, opening the guide in a dialog on the same page.
- Make the dialog close with Escape and return focus to the selector.
- Run it on product pages with sizes, for all traffic.
What to measure
| Metric | |
|---|---|
| Primary metric | Orders per visitor |
| Metric that must not get worse | Add-to-carts |
| Where it is measured | Product pages with a size selector |
| After the test | Size-related returns on each version's orders |