Size Bracketing: Why 63% of Shoppers Order Extra Sizes to Return

Most return-rate conversations treat every return as the same problem. Bracketing hides inside that number. A shopper who orders a shirt in small, medium, and large, keeps the medium, and sends the other two back counts as two separate returns on most dashboards, even though it was one purchase decision, made because the store never told them which size would actually fit.

What is size bracketing?

Bracketing is ordering the same product in more than one variant, most often size, with a plan to return everything except the one that works. It is not theft and it is not fraud in the way wardrobing is; the shopper intends to keep and pay for one item. The problem for a retailer is that it turns one sale into two or three shipments, two or three return processes, and a good chance that at least one of the returned garments cannot be resold at full price.

Optoro's 2024 State of Returns Report breaks bracketing down by what shoppers actually over-order on. Size leads by a wide margin.

• Size: around 40 percent of bracketing behavior, the most common form by far.
• Color: about 35 percent.
• Style: about 24 percent.
• Price range: about 11 percent, ordering across a few price points to compare quality.

Why do shoppers bracket sizes in the first place?

Statista surveyed US shoppers on exactly this question, and the answers point almost entirely at missing information, not indecision for its own sake.

Two of those four reasons, unclear sizing and no way to try before buying, are exactly what a photo based fit preview solves. The other two, brand unfamiliarity and a changed body shape, are also fit questions at their core; a shopper who does not know how a new brand runs, or how their own body has changed, is trying to answer the same question a size chart cannot: what will this specific garment actually look like on me.

How much does bracketing actually cost a retailer?

Every bracketed order multiplies the standard cost of a return by however many extra sizes went out. Our fashion return cost calculator post covers the baseline: returns cost an average of 21 percent of order value once reverse shipping, inspection, and restocking are counted. A single bracketed purchase can trigger that cost two or three times over for what was, from the shopper's perspective, one buying decision.

Fit and sizing intelligence company True Fit reports that retailers using its measurement based fit prediction see bracketing-driven returns fall by 24 percent at multi-brand retailers and by as much as 50 percent at single-brand, direct-to-consumer sellers. The gap between those two numbers is itself informative: a single-brand retailer can tune fit guidance around one consistent size run, while a multi-brand retailer is fighting inconsistent sizing across every label in its catalog, a harder problem to solve with a size chart alone.

Do return fees stop bracketing, or does a fit preview?

Zara has charged a fee for mail-in returns in the US since 2022 ($3.95 at launch, now $4.95, deducted from the refund; returns to a physical store stay free). Retail trade coverage ties that fee, paired with the AI virtual try-on tool Zara added to its app in 2026 (covered in our Zara and Zalando piece), to both better protected gross margin and reduced bracketing specifically, not just a lower overall return rate.

The two levers work at different points in the purchase. A return fee acts after the order: it raises the cost of guessing wrong, which discourages ordering three sizes on the assumption that returning two is free. A fit preview acts before the order: it answers the sizing question the shopper would otherwise have solved by bracketing, so there is less reason to order extra sizes at all. Retail press has also described return fees as the more contentious of the two with shoppers, since a fee reads as a penalty; a fit preview carries no equivalent downside, since it adds information rather than removing money.

What actually reduces size bracketing?

None of these fixes replace the others. They target different pieces of the same behavior.

1. A pre-purchase fit preview. Directly answers the two most cited reasons shoppers bracket: unclear sizing and no way to try an item on. This is the specific gap Corlen closes, letting a shopper see a garment on their own uploaded photo before they buy it.
2. Clear, garment specific size charts. Reduces the brand-unfamiliarity reason, though it does nothing for a shopper who cannot picture how a cut will sit on their own frame.
3. Measurement based fit prediction. True Fit's own results above show this works, especially for single-brand retailers with a consistent size run.
4. A return fee on mail-in orders. A blunt deterrent, best used once the other three have already reduced the underlying need to over-order.

For the broader case on reducing fashion returns overall, see how to reduce online fashion returns. To put a number on what bracketing and other fit-driven returns are costing your own store, try the return cost calculator, and if you run a Shopify store, see how Corlen installs on a product page. Or try Corlen on your own photo to see what a shopper sees before they ever have to guess a size.