October 26, 2026
A size chart earns its place by answering one question at the moment of doubt: will this fit me, my dog, my room, or my table? On Shopify you can add one with a dedicated page and a link, with metafields that show the right chart per product, or with an app. This guide compares the routes, explains where the chart link belongs, and covers the formatting that makes a chart usable on a phone, where most sizing questions happen.
If every product shares one sizing system, a single size chart page linked from product templates is enough. Create the page, build the table, and add a text link or tab near the size selector. This is the fastest route and adds no recurring cost or script weight to your store.
If different categories size differently, use metafields. Store each chart as page content or structured data on the product or collection, and render it only when present. That gives shoes a shoe chart and jackets a jacket chart without dozens of templates. Apps make sense when you need measurement conversion, fit recommendations, or popups across a large catalog and cannot maintain the content by hand.
The chart link belongs next to the size selector, not in the footer and not only on a FAQ page. Label it plainly, Size guide or Size chart, and make it open in a popup or an expandable section so the shopper does not lose the product page, their selected variant, or their place in checkout thinking.
On mobile, test the full flow with your thumb. If the chart opens as a wide desktop table that needs pinch zooming and sideways scrolling, it will not be used, and returns will tell you so. Design the chart table for narrow screens first: fewer columns, clear headers, and units stated in the header row.
Include the measurements that decide fit for your product, in both inches and centimeters if you sell internationally, and say what each measurement means. Chest is obvious to you and ambiguous to a first time buyer. A one line note, measured flat across the front, prevents the most common misreads.
Add a short how to measure section with a simple diagram or clear steps, and be honest about fit notes: runs small, relaxed through the shoulder, size up between sizes. That guidance, written from your returns data, does more to cut returns than the table alone. Update it when suppliers or patterns change.
After adding charts, watch return reasons and pre purchase questions for sixty days. A working chart reduces size related contacts and exchanges on the products that carry it. If questions continue, read them closely: they usually point to the exact missing row, unit, or note the chart needs next.
Keep the chart content owned by you, in pages or metafields, even if an app displays it. Stores that let an app own the only copy of their sizing content lose it when they change apps. Portable content and a light display layer is the durable setup for a store that expects to keep growing.
Keep reading on this site: Index, Index, Index. Each of those pieces connects to the ideas above and gives more detail on the parts this guide could only summarize.
Right beside the size selector, labeled plainly as Size chart or Size guide. That is the moment shoppers hesitate, and a chart hidden in a footer or FAQ page arrives too late to prevent a wrong size order.
Only if you need features like unit conversion, fit finders, or popups across many different sizing systems. For one or a few charts, a page or metafields plus a template link does the job with no monthly fee or extra scripts.
Use metafields. Attach the right chart content or page reference to each product or collection, and render it in the template only when the field is filled. That scales across categories without separate templates for each one.
Both inches and centimeters if you sell beyond one country. State the unit in the column header, and add a short note explaining how each measurement was taken, because measurement method causes more confusion than units do.