# Size guide link moved above the size dropdown: +21% conversion

- Outcome: Won
- Page type: Product page (Ecommerce)
- Elements: Variant, size & option selectors, Layout, fonts & visual design
- Date shared: 2020
- Test run by: [GrowthRock](https://liftarchive.com/practitioners/growthrock/)
- Commentary by: LiftArchive (our analysis, not theirs)
- Original source: https://growthrock.co/size-guide-ab-test-apparel-ecommerce/
- Page: https://liftarchive.com/test/growthrock-apparel-size-guide-near-size-dropdown/

Moving the size guide link up to sit just above the size dropdown lifted conversion rate by 21% for an apparel ecommerce client. GrowthRock ran this A/B test, which reached 96% significance after 10 days. Average order value rose 22% and revenue per session 46%, but each version had fewer than 200 conversions.

## Result

**+21% conversion**

- Conversion rate: +21% at 96% statistical significance after 10 days.
- Average order value: +22%.
- Revenue per session: +46%, combining the two gains above.
- Few people clicked the size guide: heatmaps showed about 1.65% of tracked desktop users and 0.31% of mobile users.

## Control

The size guide link sat low on the product page, inside the description.

## Variant

The size guide link moved up to sit just above the size dropdown.

## Why it likely won (our reading)

- The size guide answers a key question at the moment shoppers pick a size, so it makes sense next to the dropdown.
- Its new position may reassure shoppers that help with fit exists, even if they never open it.
- If sizes often sell out, shoppers need to judge whether another size will fit, which makes sizing help more important.

## Caveats

Each version had over 20,000 sessions but fewer than 200 conversions, and GrowthRock itself advised caution. The test dates from around 2020.

## How to run this test

- Hypothesis: If we move the size guide link next to the size selector, then more visitors will buy because fit help is visible when they choose a size.
- Primary metric: Conversion rate
- Guardrail: Return rate for wrong size
- Guardrail: Average order value
- Guardrail: Add-to-cart rate
- Who should test it: Apparel and footwear stores where fit is a common worry or sizes often sell out. If most shoppers are repeat buyers who know their size, expect a smaller effect.

---

Credit: GrowthRock ran this test and owns the result. Summary and commentary by LiftArchive (https://liftarchive.com/test/growthrock-apparel-size-guide-near-size-dropdown/).
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.