What it is
A shopper who is unsure of their size has three choices: guess, leave the page to check, or order two sizes and send one back. Size and fit guidance is the set of small changes that try to settle the question on the page instead — a line on how the item runs, a guide or a finder, and the design of the picker that holds the sizes.
Every experiment in this group sits on the product page, almost always next to the size options.
What brands tried
The experiments in the record fall into a few themes, all seen between May and October 2026. No brand is named in this section.
Fit notes by the picker. Several brands added a short line of fit guidance next to the sizes: "size up", "go up half a size", "wide width", or a small scale running from small to large.
The picker itself. Several redesigned the size picker: a dropdown against visible buttons, sizes opened in a pop-up, a grid of three per row, or the size pre-selected from the filter the shopper had already used.
Guides and size tools. Several changed the size guide or the size tool: a guide added where there was none, a guide rewritten as short fit bullets, a guide based on body measurements or height, a size-finder form, or the tool removed or relabelled ("What's my size?").
Sizing systems. A couple added notes on sizing systems: US and UK sizes, EU equivalents, international size charts.
Labels and buttons. A couple changed the words around size: the buy button asking for a size first, or the "Sizing" label above the options renamed.
Examples from the record
Public examples from the record, with the page before and the version tested. The chip shows what the brand did next: Shipped means the tested version became the page; Rolled back means the original stayed. A card without a chip shows what the test looked like; its outcome is being rechecked.
Before
Tested
Zimmermann
Product page- What changed
- A shopper evaluating an item on the product page no longer sees the automated sizing and measurement tool, relying instead on standard manual size selection.
- Likely hypothesis
- If Zimmermann removes the automated sizing tool, then more shoppers will add to cart, because they skip a secondary decision widget and go straight to buying.
- Strategic takeaway
- Removing secondary decision-making widgets can decrease cognitive load and streamline the main conversion funnel.
- Principle
- Feature Simplification
Seen 21 Jul to 5 Aug 2026
Before
Tested
Moncler
Product pageProduct page size-prompt buttonWhat changed Relabels the purchase button to prompt size selection first.
Seen 3 Aug to 18 Sep 2026
Before
Tested
R.M.Williams
Product pageProduct page size-label wordingWhat changed Renames the "Sizing" label above the size options.
Seen 14 Aug to 1 Sep 2026
Before
TestedZimmermann
Product pageProduct page size guide additionWhat changed Adds a size guide link inside the product details.
Seen 14 Jul to 1 Sep 2026
What this page does not tell you
- Whether it works. There are no outcome rates here. Outcomes — whether each brand kept the change — are tracked per experiment and are part of the Intelligence plan.
- Whether it will work for you. Your shoppers, prices and range differ from the brands in the record. A change one brand kept can fail on another site.
- Why a brand decided. One experiment is one brand's decision. The record shows what the brand did next, not the measured lift behind it.
ABSee is experimentation intelligence for ecommerce: a record of real experiments run by 1,150+ brands, with the page before, the version tested, and whether it was kept. How the record is built.
How to use this
Treat this page as evidence for a hypothesis, not an answer.
- Bring it to your own hypothesis. Name the problem on your own product page that this change would address, and for which shoppers.
- Check the record for your category. Look for brands like yours, the version they tested, and what they did next.
- Test it yourself. Your own experiment is the only result that applies to your site.
Questions
Does size and fit guidance increase conversion?
ABSee does not publish a rate for this or any other pattern. What the record shows is what brands tried and, for each experiment, whether the brand kept the change. Those outcomes are part of the Intelligence plan.
Which brands have tested size and fit guidance?
ABSee has recorded 20–30 brands testing it between May and October 2026. The public examples on this page are Moncler, R.M.Williams and Zimmermann. The others are named in the record.
Where does size and fit guidance go on the product page?
In the record, in and around the size picker: fit notes next to the sizes, guides and finders as a link beside the picker or inside the product details, and a couple of buy buttons that ask for a size first. That is what brands tried, not where it works best.
How current is this?
The figures here are refreshed with the ABSee record. The experiments behind them were seen between May and October 2026.