Size Guide: The Page That Actually Reduces Returns
Poor fit accounts for somewhere between 50 and 75 percent of all online clothing returns, making it by far the single biggest driver of returns in the entire category (CORDIS). A clear, genuinely useful size guide is one of the few pages on your site that directly attacks that specific problem, rather than just providing information.
This guide covers what to include beyond a basic measurement chart, how to present sizing clearly, and how to handle fit differences across garment types. It builds on our broader guide to essential pages, which covers this alongside your FAQ, return policy, and contact pages.
Why Size Guides Directly Reduce Returns
A customer uncertain about sizing has two options: buy anyway and risk a return, or hesitate and possibly abandon the purchase entirely. A genuinely clear size guide removes that uncertainty at the exact moment it matters, before checkout rather than after an unwanted delivery.
This makes the size guide one of the highest-leverage pages on your entire site relative to the effort it takes to build well. Getting it right pays back continuously across every future order, not just once.
What to Include Beyond a Measurement Chart
- A standard measurement chart: chest, waist, hip, and length measurements per size, in both metric and imperial if you sell internationally.
- How-to-measure instructions: clear guidance on how a customer should measure themselves, since many don’t know how to take an accurate chest or waist measurement.
- Fit notes per garment style: whether a specific style runs true to size, oversized, or fitted, since this varies even within one brand’s catalog.
- Model reference details: the model’s height and the size they’re wearing in product photos, giving customers a real-world reference point.
A measurement chart alone answers the question “what are the numbers.” The rest of this list answers the more important question: “what will this actually feel like on my body.”
Measuring and Presenting Sizes Clearly
Present measurements in a genuinely scannable table, not a paragraph of running text. Customers checking a size guide are looking for a specific number quickly, not reading for enjoyment, so prioritise clarity and speed over creative formatting.
If your sizing runs differently from standard conventions, whether smaller, larger, or simply unique to your brand, say so explicitly and prominently rather than letting a customer discover the mismatch only after their order arrives.
Handling Fit Differences Across Garment Types
A single, universal size chart across your entire catalog rarely works well once you have more than a couple of garment types. A boxy, oversized hoodie and a fitted, tailored shirt need separate sizing guidance, since the same size label can fit very differently between the two.
Link directly to the relevant size chart from each individual product page, rather than making customers navigate to a single generic page and guess which section applies to what they’re looking at.
Making It Easy to Find
A size guide only helps if customers actually find it before they need it. Link to it directly and visibly from every product page, ideally right next to the size selection dropdown itself, rather than burying it in a footer menu a hesitant customer might not think to check.
Consider opening it in a pop-up or side panel rather than navigating away from the product page entirely, so a customer doesn’t lose their place while checking their size.
Common Mistakes
- One generic chart for every garment type. Fit varies significantly between silhouettes, and sizing guidance should reflect that.
- Burying the link in a footer menu. Place it directly and visibly on every product page instead.
- No how-to-measure guidance. Numbers alone don’t help a customer who doesn’t know how to measure themselves accurately.
- Not disclosing unusual sizing conventions. If your sizing runs differently from standard, say so clearly before the customer orders, not after.
Frequently Asked Questions About Size Guides
Poor fit accounts for somewhere between 50 and 75 percent of all online clothing returns, making it by far the biggest single driver of returns in the category. A clear size guide directly addresses this specific, dominant cause.
How-to-measure instructions, fit notes per garment style indicating whether it runs true to size or oversized, and model reference details like height and the size they’re wearing in photos, all give customers more context than raw numbers alone.
Generally not once you have more than a couple of garment types. A boxy, oversized hoodie and a fitted shirt need separate sizing guidance, since the same size label can fit very differently between silhouettes.
Directly and visibly from every product page, ideally right next to the size selection dropdown itself, rather than burying it in a footer menu a hesitant customer might not think to check before ordering.
A pop-up or side panel is often preferable, since it lets a customer check their size without losing their place on the product page they were viewing, reducing friction compared to navigating away entirely.
