---
title: How to build a size chart for fashion e-commerce · We Wear
description: "Body or garment measurements, one chart per category, measurement points and fit notes: how to build a size chart that actually helps shoppers choose."
image: https://wewear.tech/hubfs/wewear_2025/images/og_image.jpg
---

Virtual Fitting & Size, size recommendation and virtual try-on  · [Book a free demo →](https://wewear.tech/en/contact-us?hsLang=en)

[![We Wear](https://wewear.tech/hubfs/wewear_2025/images/logo_white.png)](https://wewear.tech/en?hsLang=en)

- Products ▾
  
  [SizeFlow size recommendation](https://wewear.tech/en/sizeflow?hsLang=en) [FitFlow Virtual Try-On](https://wewear.tech/en/fitflow?hsLang=en) [3D Configurator Real-time customisation](https://wewear.tech/en/3d-configurator?hsLang=en) [AI Studio AI content production](https://wewear.tech/en/ai-studio?hsLang=en) [StyleFlow Automated AI outfits](https://wewear.tech/en/styleflow?hsLang=en) [VisualFlow Visual search & shop the look](https://wewear.tech/en/visualflow?hsLang=en) [ScanFlow Video body scanning](https://wewear.tech/en/scanflow?hsLang=en) [3D Body Scanner Body scanning booth](https://wewear.tech/en/3d-body-scanner?hsLang=en)
- [Clients](https://wewear.tech/en/#clienti)
- [Contact](https://wewear.tech/en/contact-us?hsLang=en)

[Request info](https://wewear.tech/en/#contact)[Book Demo](https://wewear.tech/en/contact-us?hsLang=en)

[IT](https://wewear.tech/it/blog?hsLang=en)EN

Products

[SizeFlow](https://wewear.tech/en/sizeflow?hsLang=en) [FitFlow](https://wewear.tech/en/fitflow?hsLang=en) [3D Config.](https://wewear.tech/en/3d-configurator?hsLang=en) [AI Studio](https://wewear.tech/en/ai-studio?hsLang=en) [StyleFlow](https://wewear.tech/en/styleflow?hsLang=en) [VisualFlow](https://wewear.tech/en/visualflow?hsLang=en) [ScanFlow](https://wewear.tech/en/scanflow?hsLang=en) [3D Scanner](https://wewear.tech/en/3d-body-scanner?hsLang=en)

Navigation

[Clients](https://wewear.tech/en/#clienti)[Contact](https://wewear.tech/en/contact-us?hsLang=en)

[Book a Demo](https://wewear.tech/en/contact-us?hsLang=en)

[IT](https://wewear.tech/it/blog?hsLang=en)EN

[We Wear Journal](https://wewear.tech/en/blog?hsLang=en)

# How to build a size chart for fashion e-commerce

October 17, 2026

Almost every fashion store has a size chart. Many of them do not help much: one chart for the whole site, body measurements mixed with garment measurements, no note on fit. The shopper opens it, cannot tell which row applies to them and orders two sizes.

This guide shows how to build a size chart that really helps people choose, and why it is also the foundation of any size recommendation.

## Body measurements and garment measurements: what each is for

They are two different things and it pays to keep them separate.

- **Body measurements**: chest, waist, hips, height. They tell you which size a person is in your size system.
- **Garment measurements**: chest width, length, sleeve length, measured on the flat garment. They tell you how that specific item is made.

The difference between the two is the fit. Two size M jackets can share the same body chart and have very different garment measurements, because one is slim and the other oversized. If you only show body measurements, shoppers cannot see that difference.

## One chart per category, not per site

A single chart for the whole catalogue is easy to manage but imprecise. At a minimum you need separate charts per category (outerwear, knitwear, trousers, dresses) and per line when the fit changes. Ideally each product is linked to the size sheet of its own style.

## Which measurement points for each item

- **Tops**: chest, shoulders, sleeve length, total length.
- **Trousers**: waist, hips, rise, inseam, leg opening.
- **Dresses and skirts**: chest, waist, hips, length.

Always state how each measurement was taken (garment laid flat, seam to seam) and the unit. A small drawing with the measurement points prevents a lot of doubt.

## Fit and stretch: the missing notes

One line of text changes how the chart is read: «regular fit», «stretch fabric», «if you are between two sizes, choose the larger one». This is information shoppers look for and the chart alone does not give.

## Common mistakes

- A chart as an image, unreadable on mobile and by search engines.
- Measurements not updated when the style or the supplier changes.
- Sizes from different systems (IT, EU, UK, US) mixed without explanation.
- A chart hidden on a generic page instead of on the product page.

## From the chart to a size recommendation

Even a well-built chart asks shoppers to measure themselves and compare the numbers alone. A size recommendation does that comparison for them. SizeFlow, for example, starts from height, weight, age and gender, estimates the shopper's body measurements and compares them with each garment's size sheet, using a mathematical algorithm that always gives the same result for the same data. That is why garment size sheets are the starting point: the more precise they are, the more precise the recommendation.

We also cover this in the guide on [why shoppers order two sizes](https://wewear.tech/en/blog/why-shoppers-order-two-sizes?hsLang=en). Module details are on the [SizeFlow](https://wewear.tech/en/sizeflow?hsLang=en) page.

## Frequently asked questions

### Should you show body measurements or garment measurements?

Both, kept separate. Body measurements tell you which size a person is; garment measurements, taken flat, tell you how that item is made and therefore its fit.

### Is one size chart enough for the whole site?

Usually not. You need at least one chart per category and per line when the fit changes; ideally each product links to the size sheet of its own style.

### How does a size chart relate to a size recommendation?

Garment size sheets are the starting point: SizeFlow compares the shopper's estimated body measurements with each garment's size sheet, so the more precise the sheet, the more precise the recommendation.

## Want to see it on your catalogue?

A 30-minute call: we show you the module on one of your products and how to measure its effect with an A/B test.

[Book a demo](https://wewear.tech/en/contact-us?hsLang=en)

[← All guides](https://wewear.tech/en/blog?hsLang=en)

We Wear

Technology for fashion retail: size recommendation, virtual try-on, 3D configurator.

Products

[SizeFlow](https://wewear.tech/en/sizeflow?hsLang=en) [FitFlow](https://wewear.tech/en/fitflow?hsLang=en) [3D Configurator](https://wewear.tech/en/3d-configurator?hsLang=en) [AI Studio](https://wewear.tech/en/ai-studio?hsLang=en) [StyleFlow](https://wewear.tech/en/styleflow?hsLang=en) [VisualFlow](https://wewear.tech/en/visualflow?hsLang=en)[ScanFlow](https://wewear.tech/en/scanflow?hsLang=en)[3D Scanner](https://wewear.tech/en/3d-body-scanner?hsLang=en)

Legal

[Cookie Policy](https://wewear.tech/en/cookie-policy?hsLang=en) [Privacy Policy](https://wewear.tech/en/privacy-policy-sizeflow?hsLang=en) [Terms & Conditions](https://wewear.tech/en/terms-conditions?hsLang=en)

Contact

[info@we-wear.biz](mailto:info@we-wear.biz) Corso Plebisciti 15, 20129 Milan

© 2026 We Wear S.r.l., VAT 10337690969 [Italiano](https://wewear.tech/?hsLang=en)

[Book a free demo](https://wewear.tech/en/contact-us?hsLang=en)

```json
{
  "@context" : "https://schema.org",
  "@type" : "BlogPosting",
  "author" : {
    "@id" : "https://wewear.tech/#organization",
    "@type" : "Organization",
    "logo" : {
      "@type" : "ImageObject",
      "url" : "https://145879691.fs1.hubspotusercontent-eu1.net/hubfs/145879691/wewear_2025/images/logo_white.png"
    },
    "name" : "We Wear",
    "url" : "https://wewear.tech/"
  },
  "dateModified" : "2026-10-17T15:55:24",
  "datePublished" : "2026-10-17T15:50:10",
  "description" : "Body or garment measurements, one chart per category, measurement points and fit notes: how to build a size chart that actually helps shoppers choose.",
  "headline" : "How to build a size chart for fashion e-commerce",
  "image" : "https://145879691.fs1.hubspotusercontent-eu1.net/hubfs/145879691/wewear_2025/images/og_image.jpg",
  "inLanguage" : "en",
  "mainEntityOfPage" : "https://wewear.tech/en/blog/how-to-build-size-chart-ecommerce",
  "publisher" : {
    "@id" : "https://wewear.tech/#organization",
    "@type" : "Organization",
    "logo" : {
      "@type" : "ImageObject",
      "url" : "https://145879691.fs1.hubspotusercontent-eu1.net/hubfs/145879691/wewear_2025/images/logo_white.png"
    },
    "name" : "We Wear",
    "url" : "https://wewear.tech/"
  }
}
```

```json
{
  "@context" : "https://schema.org",
  "@type" : "BreadcrumbList",
  "itemListElement" : [ {
    "@type" : "ListItem",
    "item" : "https://wewear.tech/en",
    "name" : "We Wear",
    "position" : 1
  }, {
    "@type" : "ListItem",
    "item" : "https://wewear.tech/en/blog",
    "name" : "We Wear Journal",
    "position" : 2
  }, {
    "@type" : "ListItem",
    "item" : "https://wewear.tech/en/blog/how-to-build-size-chart-ecommerce",
    "name" : "How to build a size chart for fashion e-commerce",
    "position" : 3
  } ]
}
```

```json
{
  "@context" : "https://schema.org",
  "@type" : "BlogPosting",
  "author" : {
    "@type" : "Person",
    "name" : "We Wear",
    "url" : "https://wewear.tech/en/blog/author/we-wear"
  },
  "datePublished" : "2026-10-17T15:50:10.000Z",
  "headline" : "How to build a size chart for fashion e-commerce · We Wear",
  "image" : [ "https://wewear.tech/hubfs/wewear_2025/images/og_image.jpg" ],
  "mainEntityOfPage" : {
    "@id" : "https://wewear.tech/en/blog/how-to-build-size-chart-ecommerce",
    "@type" : "WebPage"
  },
  "publisher" : {
    "@type" : "Organization",
    "logo" : {
      "@type" : "ImageObject"
    }
  }
}
```

```json
{
  "@context" : "https://schema.org",
  "@type" : "FAQPage",
  "mainEntity" : [ {
    "@type" : "Question",
    "acceptedAnswer" : {
      "@type" : "Answer",
      "text" : "Both, kept separate. Body measurements tell you which size a person is; garment measurements, taken flat, tell you how that item is made and therefore its fit."
    },
    "name" : "Should you show body measurements or garment measurements?"
  }, {
    "@type" : "Question",
    "acceptedAnswer" : {
      "@type" : "Answer",
      "text" : "Usually not. You need at least one chart per category and per line when the fit changes; ideally each product links to the size sheet of its own style."
    },
    "name" : "Is one size chart enough for the whole site?"
  }, {
    "@type" : "Question",
    "acceptedAnswer" : {
      "@type" : "Answer",
      "text" : "Garment size sheets are the starting point: SizeFlow compares the shopper's estimated body measurements with each garment's size sheet, so the more precise the sheet, the more precise the recommendation."
    },
    "name" : "How does a size chart relate to a size recommendation?"
  } ]
}
```