Size Chart

Display fitting guides on product pages

Is this for me?

If you sell anything where fit matters — apparel, shoes, rings, hats, swimwear — Size Chart gives shoppers a quick way to check measurements before they buy. A customer browsing a t-shirt taps the Size Chart button on the product page, a pop-up opens with your sizing table, and they pick the right size the first time. Fewer wrong-size returns, more confident add-to-carts.

Which chart type should I pick?

Before you start: If you sell across categories (tops, bottoms, shoes), plan to build one chart per category and assign each to the right collection — one universal chart confuses shoppers more than it helps.

Setup, Step by Step

1. Open Vitals and enable the Size Chart app.
2. Click to create a new chart.
3. Pick From image or Create table.
4. Enter a name (for your reference) and a title (what shoppers see in the pop-up). Set the unit of measure (cm, inches, etc.).
5. Add your content — upload the image or fill in the table rows and columns.
6. (Optional) Turn on the How to measure guide, add text and an image, and choose whether it appears above or below the chart.
7. Under Visibility, assign the chart to all products, specific products, or specific collections.
8. Set the chart to Active and save.
9. (Optional) Open Settings to customize the button — Button text, Icon, Button color, underline.
10. (Optional) From Settings, adjust the pop-up Background color, Text color, Table style, Border thickness, Border color, and Striped row background color.
11. Open an assigned product on your storefront and confirm the button appears and the pop-up opens.

How visibility works

You can create as many charts as your catalog needs. Each one is assigned to all products, specific products, or specific collections.

If a product matches more than one chart, the most specific assignment wins:

• Product-level beats collection-level
• Collection-level beats all-products

So a shoe-specific chart will override your store-wide fallback whenever a shopper lands on a shoe.

When to use this: tables vs. images

Use a table when you want shoppers on phones to read it without pinching to zoom, or when sizes change seasonally and you'll update them. Use an image when your chart has illustrations, branded design, or your manufacturer gave you a polished PDF you don't want to rebuild.

Tips for Getting the Most Out of It

• Build for mobile first. Most shoppers will open the chart on their phone. Tables stay crisp at any width; uploaded images can become tiny and unreadable. If you must upload an image, make sure the text is large enough to read on a 5-inch screen.
• Add a "How to measure" guide. A chart full of numbers is useless if shoppers don't know where to put the tape measure. The optional guide with a simple illustration solves most "what does chest mean?" confusion.
• Match your store's look. Set the pop-up Background color and Text color to fit your theme — a bright white pop-up on a dark store looks like a bug, not a feature.
• Pick the right icon. The default Measuring Tape works for apparel. For shoes try Ruler; for accessories try no icon and rely on the button text. Small detail, but it signals "we thought about this."
• Be honest about variation. If your sizes run small or vary by manufacturer, say so in the chart title or above the table. Shoppers trust stores that warn them, and you'll still get fewer returns than burying the truth.
• Test on a real product page. After setup, open the actual product (not just the preview) and click through. Confirm the button placement looks right on your theme and the pop-up displays cleanly.

Frequently Asked Questions

What does the Size Chart app do?

It adds a Size Chart button to your product pages. When shoppers click it, a pop-up opens with the sizing guide you set up — either an uploaded image or a table built in Vitals.

Can I create more than one size chart?

Yes — as many as you need. Each chart has its own title, content, and visibility rules.

How do I decide which chart shows on which product?

Under Visibility, assign each chart to all products, specific products, or specific collections. If a product matches more than one chart, the most specific assignment wins (product beats collection beats all-products).

Where does the Size Chart button appear?

On the product page, near the variant picker and Add to Cart button. It only shows up on products that have a matching active chart.

Can customers see how to measure themselves?

Yes. Each chart has an optional How to measure guide with your text and image. You choose whether it appears above or below the chart in the pop-up.

Can I translate the chart and the button?

Yes. Button text translates into every language your store has enabled, with defaults shipped for English, Dutch, German, Spanish, French, Italian, Portuguese, Russian, Japanese, Chinese (Simplified and Traditional), Danish, Romanian, Arabic, Norwegian, and Swedish. Chart titles and content are translatable per language too.

Can I deactivate a chart without deleting it?

Yes. Set it to Inactive — the chart disappears from the storefront immediately, but the content stays saved.

Why isn't the Size Chart showing on a product?

Check three things: the Size Chart app is enabled, the chart's status is Active, and the product matches the chart's Visibility rules. If all three look right and the button still doesn't appear, reach out to Vitals support.

Settings Reference

Button on the Product Page

Size Chart Pop-Up

Table Styling