How to Add a Size Chart in Shopify (3 Ways, With and Without an App)
Short answer: You can add a size chart in Shopify in three ways: (1) a page + metafield + pop-up block in your theme (free, Shopify’s method), (2) a size chart app with assignment rules, or (3) custom Liquid code. For more than a few charts, an app usually saves time because charts assign automatically.
Method 1: Free, no app (page + metafield + pop-up)
Shopify’s official flow uses a page reference metafield and a pop-up block on Online Store 2.0 themes. Start here: Shopify pop-up size chart tutorial.
Limits: You set up each product (or type) manually. Managing 20+ charts gets repetitive compared with collection/tag rules in an app.
Method 2: Using a size chart app (Honest Size Charts)
Full install walkthrough (exact screens and buttons): How to install and set up Honest Size Charts.
- Install on Shopify.
- Create a chart in the grid editor or upload an image (images store in Shopify Files).
- Assign by product, collection, tag, or vendor.
- In the theme editor, add the Honest size chart theme app block on your product template.
- Open a product page and confirm the popup opens on desktop and mobile.
Free plan: 3 published charts, no watermark. Pro: $8.99/month flat for unlimited charts.
Method 3: Custom Liquid (brief)
Developers can render metafields or snippets in product.liquid or JSON templates. Useful if you already maintain theme code and only need one or two static charts.
Which method should you choose?
| Situation | Good fit |
|---|---|
| 1–3 charts, happy to use metafields | Shopify free method |
| Many products, collections, or tags | Size chart app |
| Fully custom theme, dev on staff | Liquid |
Tips
- Place the “Size chart” link near the size selector on the product page.
- Offer cm and inches if you sell internationally.
- Measure your own garments — templates are starting points, not brand-specific standards.
Next: Size chart templates · Pricing · Size chart vs size guide
FAQ
- Does Shopify have a built-in size chart?
- Shopify provides a tutorial for a pop-up size chart using a page reference metafield and a theme block — not a full chart manager in admin.
- Can I add a size chart without an app?
- Yes, using a page, metafield, and pop-up block on Online Store 2.0 themes. It works well for a handful of charts; apps help when you have many products or assignment rules.
- How do I show different size charts on different products?
- With metafields, set a different page per product. With Honest Size Charts, assign charts by product, collection, tag, or vendor. For fit blocks, collection rules, and overlapping assignments, see different size charts per product.
- Will a size chart app slow down my store?
- Theme app blocks load with your product page; test your product template in the theme editor and with Lighthouse after you add the block.
Try Honest Size Charts on your store
3 charts on Free, no watermark — theme app block for Online Store 2.0.
Your customers’ tape measures will thank you.