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Fit Guide

The Ultimate Guide to Online Fashion Fit โ€” and Reducing Returns

February 28, 2026  ยท  8 min read

Online fashion has a returns crisis. Industry data consistently shows return rates of 25-40% for online apparel purchases, compared to under 10% for physical retail. The cost to the industry is staggering โ€” and the environmental impact adds a cost that goes beyond the financial.

The root cause is almost always the same: the item didn't fit the way the customer expected.

Why online sizing is broken

Unlike physical goods with standardised measurements, fashion sizing is deliberately unstandardised. A size 12 at one retailer is not a size 12 at another. Within a single brand, sizing varies by category โ€” the same brand's structured blazer may run two sizes smaller than their jersey dress. And sizing varies over time.

Understanding garment measurements vs. body measurements

The most important shift in approach for online shoppers is moving from size labels to garment measurements. Most quality retailers publish detailed garment measurements โ€” the actual dimensions of the physical garment. If you know your own measurements, you can match them against garment measurements and predict fit with far greater accuracy than size labels allow.

Key garment measurements to check:

The five-question pre-purchase checklist

Before completing any online fashion purchase, ask:

The environmental case for buying right

The environmental cost of a returned garment is significant. The transportation emissions of the return journey, the processing cost, the high rate of returned items that never make it back to shelves โ€” all of this adds up. Buying right the first time isn't just financially sensible; it's one of the most direct levers available to fashion consumers who want to reduce their environmental footprint.