Interactive size finder instead of size chart: +8% conversion rate
Test run byDRIP AgencyCRO agency
Commentary byLiftArchiveOur analysis, not theirsReplacing a static size chart with an interactive 'Find My Size' tool lifted conversion rate by 8.0% and revenue per user by 10.0% on Oceansapart's product pages.
DRIP Agency ran this test for the activewear brand and published it as a case study.
The tool, Sizekick, gives each shopper a size recommendation instead of a generic table to read.
- Conversion rate: +8.0%. More visitors to the product page went on to buy.
- Revenue per user: +10.0%. Revenue grew a little faster than orders, which hints at bigger or pricier baskets.
- Sample size, duration and confidence level were not shared.
The change
Static size chart replaced by an interactive size recommendation tool
Simplified mockup drawn by LiftArchive from the shared screenshots.
Control
The product page offered a standard static size chart. Shoppers had to read the table and work out their own size.
Variant
A 'Find My Size' link opened Sizekick, an interactive tool that recommends a size. The rest of the page stayed the same.
Why it likely won
Our reading of the result, not the practitioner's claim.
- Fit is a big worry when buying activewear online. DRIP's research ranked fit and size confidence as a top purchase driver for this brand.
- A personal answer takes less effort than reading a size table and comparing it with your own measurements.
- A tailored size can feel more trustworthy than a guess, so fewer shoppers leave to think it over.
Caveats: Significance, sample size and test length were not shared. The numbers come from the agency's own case study.
Who ran it
DRIP Agency ran this test for Oceansapart and published the results (DRIP Agency case study). The numbers are theirs; the summary and commentary on this page are ours.
Read the original case study on DRIP Agency →
How to run this test on your store
- Hypothesis
- If we replace the static size chart with an interactive size recommendation tool, then more shoppers will buy because they feel sure the item will fit.
- Primary metric
- Conversion rate on product pages
- Guardrails
- Return rate for wrong size
- Revenue per user
- Page load speed on mobile
- Who should test it
- Apparel and footwear stores where fit decides the sale and size-related returns are common. It matters less for one-size or loose-fit products, or where shoppers already know their size from past orders.
Questions
Do size recommendation tools increase conversion?
They can. In this test an interactive tool lifted conversion rate by 8% over a static chart.
Results depend on how much fit worries your shoppers.
Should I remove my size chart if I add a size finder?
Not necessarily. Some shoppers still like to check measurements, so many stores keep the chart as a backup next to the tool.
What else should I measure besides conversion?
Track returns for wrong size. A size tool that boosts sales but sends people the wrong size can cost you on returns.
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