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Two Tools That Sound the Same — But Aren't
"Size chart" and "size recommendation" get used interchangeably, but they do fundamentally different jobs. Understanding the difference is the difference between a product page that informs and one that actually reduces returns.
A Size Chart Shows Information
A size chart is a table: it lists measurements for each size — chest, waist, hips, length. It tells the shopper what your sizes are. That's useful as a baseline of trust, but it puts the work on the customer: they have to measure themselves, interpret the grid, and translate numbers into a decision.
The problem is that most shoppers don't. Industry data is blunt about it — the majority of customers don't open the size chart at all, and the ones who do still have to guess at the translation. A chart is necessary, but it's passive.
A Size Recommendation Makes a Decision
A size recommendation flips the model. Instead of "here are our measurements, good luck," it says "based on you and this product, your size is M." It takes the shopper's inputs (or how they fit in other brands) and the specific garment, and returns an answer — no interpretation required.
That distinction matters because fit and sizing drive 53–70% of apparel returns, and most of that comes from the interpretation step a chart hands back to the customer. A recommendation removes that step.
Why the Difference Shows Up in Returns
The evidence is direct. In one study, shoppers picking from a general listing returned 20% of purchases — but those who followed a direct product recommendation returned only 5%. Same catalog, 4x fewer returns, just from replacing a table with a decision.
Do You Need Both?
Yes — they're complementary:
- The chart builds baseline trust and serves shoppers who want the raw numbers.
- The recommendation makes the decision for everyone else, which is most people.
Add the chart first (see How to Add a Size Guide to Your Shopify Store), then layer a recommendation on top for the biggest return reduction. We make the fuller case in The Size Chart Is Dead.
Where YourSizer Fits
YourSizer is the recommendation layer — it sits on top of your existing chart and turns measurements into a per-shopper, per-product answer. See how it works on the for-brands page.
Sources
Frequently Asked Questions
What's the difference between a size chart and a size recommendation?
A size chart shows measurements and asks the shopper to interpret them. A size recommendation takes the shopper's inputs and the specific product and tells them which size to buy.
Which reduces returns more?
A recommendation. In studies, moving shoppers from a general listing to a direct product recommendation cut returns from 20% to 5%.
Should I use both?
Yes. The chart provides baseline trust; the recommendation makes the decision for the majority of shoppers who won't interpret a chart themselves.