What Happens When a Store Has No Size Chart?

When a store has no size chart, ZeDaq.ai's "Find my size" still works: it matches the shopper's measurements to a generic UK, US, EU or AU chart instead. The shopper gets a standard size, but it may not match how your brand actually cuts its clothes.

That fallback keeps the button useful on day one. It is a starting point, though, not the end goal. This article explains what the shopper sees without a chart, where generic sizing falls short, and when you should add your own. For the bigger picture of how scan-based sizing works, read the guide to AI size recommendation.

How does Find my size work if there is no chart?

The scan itself doesn't change. The shopper uploads one photo and types their height. Their body measurements are worked out on their own device.

What changes is the chart those measurements are compared against:

Situation	Chart used	Size the shopper sees
You added a chart for this garment type	Your own chart	Your own label, such as "M" or "UK 12"
No chart for this garment type	Generic fallback chart	A standard UK, US, EU or AU size

Charts are set per garment type: tops, outerwear, dresses and bottoms. So a store can have its own chart for dresses and still rely on the fallback for outerwear. The two can live side by side while you fill in the gaps.

What does a generic size chart get wrong?

Generic sizing assumes every brand cuts to the same measurements. They don't. One brand's medium can be another brand's large, and vanity sizing makes the gap worse.

Here is where the fallback is most likely to miss:

• Slim or relaxed cuts. A slim-fit shirt and an oversized hoodie both get the same standard size from the same measurements.
• Brand-specific labels. If you sell in numbered sizes like 1, 2 and 3, a generic chart can't map to them.
• Stretch and fabric. Denim with no stretch fits very differently from jersey. A standard chart can't tell.
• Cultural or occasion wear. Flowing styles, wrappers and kaftans follow their own fit rules.

Denim is a good example of a category where your own chart matters most. Waist and hip fit decide whether jeans work, and cuts vary widely. The guide to sizing for denim brands covers that in detail.

Is a fallback size better than no size at all?

Usually, yes. A shopper with no guidance has to guess from a static table, or from their usual size elsewhere. A fallback gives them a size based on their own measured body.

It also sizes up when the shopper falls between two sizes. A slightly loose garment is easier to wear or alter than one that is tight.

Still, be honest on the product page. If you haven't added your own chart yet, a short fit note helps. For example: "Sizes follow standard UK sizing. This style runs slim."

When should you add your own size chart?

Add one as soon as you have your size guide in body measurements. A few signs it is time:

1. Shoppers ask "does this run small?" That question means your fit differs from standard.
2. You sell your own labels. Numbered or letter sizes that don't follow a standard need your chart.
3. You get exchanges for the next size. The same direction of exchange, again and again, points to a fit gap.
4. You sell styles outside Western standard sizing. Many African, modest and occasion brands cut to their own blocks.

That last point matters for brands selling outside standard sizing. The guide to size recommendation for African fashion explains how those brands can set up charts that match their cuts.

How do you switch from the fallback to your own chart?

In the Shopify app, or in Dashboard → Size charts on other platforms, pick a garment type and enter your ranges. Each size gets a minimum and maximum for the measurements that matter for that garment.

Once a chart is saved for a garment type, shoppers on those products see your labels instead of the generic size. Products in garment types you haven't charted yet keep using the fallback.

For the details of columns, units and closing gaps between sizes, follow the step-by-step guide to setting up your size chart.

What does it cost to test sizing before you add a chart?

The Free plan includes 3 try-ons and 3 measurements a month, enough to test the fallback on your own body. Paid plans start with Micro at $14 a month, then Starter at $49, Growth at $129 and Scale at $299. Every paid plan has a 3-day free trial with no card required. See current ZeDaq.ai plans and prices.

FAQs

Will shoppers know the size came from a generic chart?

They see a standard UK, US, EU or AU size rather than your own label. A short fit note on the product page tells them how your styles compare.

Can I use my own chart for some garments and the fallback for others?

Yes. Charts are set per garment type, so any type without a chart uses the fallback until you add one.

Do I need the fallback if I already have a chart for every garment type?

No. Once each garment type you sell has a chart, every recommendation uses your own labels.

Does the scan change when I add a chart?

No. The shopper still uploads one photo and enters their height. Only the chart their measurements are matched against changes.