Size and Fit FAQ on Shopify: Answers That Prevent Returns

Most fit problems start as unanswered questions

When a customer sends something back because it did not fit, the return usually began on the product page. They were between two sizes, or unsure whether the brand runs small, or did not know how long the sleeve was. They guessed, ordered, and found out at home.

Some shoppers deal with that uncertainty by ordering two sizes and returning one. Others do not order at all. Either way, the cause is the same: a question about fit that the page did not answer clearly enough at the moment it came up.

You cannot remove fit returns completely. Bodies differ, and some things only show when a garment is on. But a handful of plain, specific answers on the product page removes the avoidable ones. This post is about which fit questions to answer, how to word the answers so they actually settle a decision, and where those answers belong.

Start with what your returns already say

The best list of fit questions is not the one you imagine. It is the one your customers already gave you:

• Return and exchange reasons. “Too small”, “too long”, “tighter than expected”, “swapped M for L”. Group them by product.
• Pre-sale messages. “I am usually a medium, which should I get?” is the clearest fit question there is.
• Reviews. Lines such as “size up” or “fits true to size” are fit answers written by customers, and they tell you what others were unsure about.

If your returns process does not ask for a reason, start asking; it is the cheapest research you will ever do. Your return policy is also where you decide whether exchanges for size are free, which changes how much a wrong guess costs both of you.

The fit questions worth answering on the page

Across clothing, shoes and other sized products, the same questions come up again and again:

1. Does it run small, large, or true to size?
2. I am between sizes. Which should I choose?
3. What size is the model wearing, and how tall are they?
4. What are the actual measurements of this item?
5. Will it shrink, stretch or relax with wear or washing?
6. How is it meant to fit? Close-fitting, relaxed, oversized.

Not every product needs all six, and some product types have their own: width for shoes, inside leg for trousers, wrist size for a watch strap, which bed size a sheet fits. Use your return reasons to decide which three or four matter for each product.

Answer with a measurement, not an adjective

“Runs a little small” is better than nothing, but it leaves the shopper doing guesswork. The answers that prevent returns give them something to check against themselves. A useful shape: the direct answer first, then a number they can compare, then what to do.

Does it run small?

Yes, slightly. The chest is about 2 cm narrower than our other shirts in the same size. If you are between sizes, choose the larger one.

What size is the model wearing?

The model is 178 cm tall and wears a size M, with the sleeves just reaching the wrist.

Will it shrink?

Very little if washed cold and dried flat. A hot wash and tumble dryer can take it down by about half a size.

These are made-up examples, but they show the pattern: every answer starts with yes, no or a size, and gives a number the shopper can hold up against their own body or a garment they already own.

A few habits make the answers more reliable:

• Measure the item, not the pattern. Lay one of each size flat and measure it yourself. Supplier charts are often body measurements, or for a different cut.
• Say which kind of measurement it is. “Chest 104 cm” could be the body it fits or the garment itself. Write “garment chest, measured flat across: 52 cm” so nobody has to guess.
• Give the between-sizes advice per product, not once for the whole store. A stretchy knit and a stiff denim jacket need different advice.
• Use the units your customers use. If you sell across markets, give both centimetres and inches.

Size chart and FAQ: two jobs

A size chart and a fit FAQ are not the same thing, and a store needs both.

The size chart is the reference: measurements for every size, laid out in a table. It answers “what are the numbers?” for someone who already knows how they want it to fit.

The fit FAQ is the advice: how this product compares, what to do between sizes, how it behaves after washing. It answers “which one should I buy?”

Keep them consistent. If the FAQ says the shirt runs small and the chart shows it larger than your other shirts, one of them is wrong, and the customer will trust whichever suits their guess. Link from the FAQ answer to the chart rather than copying the numbers twice; a number written in two places is a number that will one day disagree with itself.

For questions that are not about fit at all, such as shipping, materials or what is in the box, the broader guide to writing a product page FAQ covers which ones belong there.

Answers that differ by product

Fit answers are more product-specific than almost any other FAQ, which creates a practical problem on Shopify. On Online Store 2.0 themes, content you add to a product page in the theme editor usually belongs to the page template, so every product using that template shows the same blocks.

Two ways to handle it:

• Group products by fit and give each group its own template. For example, one template for slim-fit shirts and another for relaxed knitwear, each with fit answers that are true for every product on it.
• Keep product-specific numbers in the description, close to the size selector, and use the template-level FAQ for advice that holds across the group.

Whichever you choose, read the FAQ on two or three products that share the template and check every answer is true for each of them.

When the answers go wrong

Fit answers change when products change: a new supplier, a new fabric, a revised pattern. When any of those happens, re-measure and re-read the fit answers the same day.

And watch the return reasons. If a product keeps coming back as “too small” even though the FAQ says to size up, the answer is either not visible enough or not strong enough. Move it higher, or make the advice more specific, rather than adding another question.

Where we come in, briefly. FAQ Accordion is one of three blocks in Store Essentials, the free app we build at ShopAppsLab. It puts up to ten questions in an accessible accordion on the product page — added from the theme editor, with no code. There are no paid plans, and the app asks for no access to your store’s data. Everything above works without it — that is the honest version.

If you do one thing this week

Pick the product with the most size returns or exchanges. Measure one of each size flat yourself, read its last ten return reasons, and write three answers: whether it runs small, large or true, what to do between sizes, and what the model is wearing. Put them on the product page, and compare the return reasons for that product in a month.