Do styling A/B tests work in E-commerce?

In line with both baselines. Styling tests win 16% in E-commerce, against 15% for styling tests generally and 14% for E-commerce generally. Neither the category nor the vertical is moving this much.

The strongest change type we can measure in E-commerce is CTA copy at 17% on 50+ tests.

The numbers

	E-commerce	all industries
Tests analysed	500+	1,000+
Beat control	16%	15%
No measurable difference	67%	—
Lost to control	18%	—
Median lift when it won	+12.6%	—

Median traffic per variant was 5060 visitors. Most ran on homepages (235), product pages (234), category pages (77).

Every change type we can measure in E-commerce

change type	win rate in E-commerce	tests
CTA copy	17%	50+
Layout	16%	100+
Styling (this page)	16%	500+
Hero image	15%	50+
Body copy	14%	100+
Price framing	12%	50+
Split URL	11%	250+
Headline	8%	100+
Social proof	8%	50+

The industry overview is at E-commerce benchmarks; rates across all industries are on the styling benchmark.

What counts as a styling test

Visual treatment shifts — spacing, weight, borders, colour, shadows — with the same content in the same order. Move the content and it is a layout test. Rewrite it and it is a copy test.

Control and variant wireframe for a styling A/B test — Control on the left, variant on the right. Only the changed element is highlighted.

Styling tests that won in E-commerce

Hides several paragraphs, secondary CTA links, and card sections without changing any remaining text
Hides the original price, seating position, and variant selector elements and shows alternate price and variant selector elements instead
Reverses order and reduces font size of the price display, and adds bottom margin to a callout info wrapper; no text changes
Hides the tax/duties information block on the product details page

Styling tests that did not

Makes header and nav bar sticky and shrinks/resizes header elements (logo, search input, nav links) on scroll
Hides SKU text, adds a page-load hiding overlay/anti-flicker mechanism, and styles buyer-counter and countdown elements without changing their wording
Changes text color to green and adds bottom padding on the targeted element, no wording change

These are individual tests, not rules. Each ran on one site, with one audience, against one page we are not showing you. They are picked to be illustrative rather than sampled at random, and a change that won here can lose on your page for reasons none of this captures. Read them as prompts for what to test, not as findings to copy.

Who ran these tests

This is every Mida account that ran a readable test — in-house marketers, founders, product teams, and agencies working on client sites. Nothing here is filtered by who ran the experiment or how experienced they are.

Low win rates are normal in experimentation, including at the top end. Microsoft's experimentation team, reporting on its own platform, found that only about one third of ideas improve the metric they were designed to improve — and that roughly another third actively hurt it. That is a dedicated experimentation organisation with research, prioritisation and review behind every test.

A mixed population like this one runs below that. The gap is roughly what disciplined practice buys you: ideas grounded in research rather than opinion, one variable at a time, and tests built so the result can actually be read.

So treat these as a general base rate, not a target. If you would rather not close that gap the slow way, find a CRO agency in the United States, the United Kingdom, the Netherlands or Australia — or browse every region.

A win is a variant that beat its control on that test's primary goal with a statistically significant result. Tests that never got enough traffic to say anything either way are excluded. The methodology has the full detail, including what these numbers cannot tell you.