Should you add a size chart to Shopify product pages?

October 1, 2026

Yes, for anything sized. A clear size chart answers the fit question before it becomes a support ticket or a return, and returns are where fit uncertainty gets expensive. The chart does not need to be fancy: body measurements, garment measurements, and a note on fit, linked right next to the size selector. Stores that sell apparel without one are paying for it in reverse logistics.

Why size charts cut returns

Fit is the top reason for apparel returns, and most fit returns trace back to guessing. The shopper picks a size based on what they wear in other brands, the brand’s sizing runs differently, and the item comes back. A size chart converts that guess into a measurement, and measured shoppers return less.

The support-ticket math matters too. “How does this fit” and “what size should I get” are among the most common pre-purchase questions for apparel stores. Every one of those questions that a visible chart answers is a ticket your team never sees and a purchase that does not stall.

Where to put the chart

Next to the size selector, not buried in a tab. The shopper’s decision moment is the second they hesitate over sizes, and a link three scrolls away might as well not exist. A small “size guide” link directly beside the variant picker, opening in a modal or drawer, catches the hesitation at its peak.

The product description is the backup location, not the primary one. Some shoppers do read descriptions before choosing a size, so a short fit note there helps, but the link by the selector does the heavy lifting. On mobile, make sure the modal is actually usable: pinch-to-zoom tables that require horizontal scrolling will be abandoned.

What a good chart includes

Body measurements first: chest, waist, hips, and inseam in both inches and centimeters. These are the numbers shoppers can actually take with a tape measure. Garment measurements second: the finished measurements of the item itself, which matter for oversized or tailored fits where the body size alone misleads.

Add a fit note in plain language. “Runs small, size up” or “designed for a relaxed fit” tells the shopper how to interpret the numbers. If you have model measurements, include the model’s size and what they are wearing. That single line resolves more doubt than any table.

Body measurements versus garment measurements

Body measurements tell the shopper which size they are; garment measurements tell them how the item will actually fit. A size medium body with a garment chest measurement two inches larger than the body chart means a relaxed fit. Shoppers who understand this distinction buy more confidently, so label the two sections clearly instead of mixing them in one table.

Measure the actual garments, not the tech pack. Production variance means the size medium on the rack can differ from the spec sheet by half an inch or more, and that half inch is exactly what a between-sizes shopper is deciding on. Spot-check measurements per production run for your best sellers.

The fit-finder question

Fit-finder quizzes and recommendation widgets can help, but they are an addition, not a replacement. They work best for stores with complex sizing across many products, where a static chart gets unwieldy. For a focused catalog, a well-made static chart outperforms a quiz that shoppers have to complete.

If you add a fit finder, keep the chart anyway. Some shoppers will always prefer to read the numbers themselves, and the chart is what search engines and accessibility tools can parse. The quiz is a convenience layer; the chart is the source of truth.