It is not that shopping got hard
The system is asking you to make a precise decision from imprecise information, then penalising you when you get it wrong.
Layer one: the charts disagree with each other
Research measuring more than 1,000 garments across 50 UK brands found only 64% matched their own published size chart within 1 cm. Average variance within a brand and category was 4.2 cm. That is not a rounding error; it is larger than many size steps.
Accuracy also degraded with size, falling from 71% at UK 8-10 to 54% at UK 20-22. And 68% of garments labelled UK 12 fell outside industry-standard parameters entirely.
Layer two: your size is brand-specific
A 2025 survey found 91% of shoppers said their size depends on the brand. Another, of 1,400 consumers, found the same 91% figure, and among those returning items, 55% said the garment was too small.
Layer three: garments are not built to your measurements
Even a perfectly charted garment has ease. NMSU Extension specifies 3 to 4 inches on the bust and 1 to 2 inches from nape to waist. Charts rarely publish this, so you cannot compute the finished fit from the listing.
Layer four: the information is asymmetric
You are asked to decide from a photograph, a chart and a size label, while the brand knows the finished garment dimensions and does not publish them. No shopper has access to what you need.
What it costs
US retailers processed $849.9 billion of returns in 2025, a 15.8% return rate, per NRF and Happy Returns. The 2024 figure was 16.9% and $890 billion.
Environmentally it is worse. The European Environment Agency estimates 22 to 43% of returned clothing bought online in Europe is destroyed, and that 4 to 9% of all textiles placed on the market never get used — 264,000 to 594,000 tonnes a year.
What you can control
You cannot fix brand variance or uncharted ease. You can remove your own body's uncertainty from the equation by knowing your measurements, and you can read reviews for the information the brand withheld.
That is a modest improvement, not a solution. The structural problem is that sizing predates the measurement data needed to fix it.
See why the labels are wrong and putting measurements to work.