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Size Matters: How ASOS Turned Uncertainty into Millions

Size Matters: How ASOS Turned Uncertainty into Millions

May 20, 2025

Size Matters: How ASOS Turned Uncertainty into Millions
Size Matters: How ASOS Turned Uncertainty into Millions

Every day, millions of shoppers fill online carts only to abandon them at checkout.

Most retailers think it's a pricing problem. Or a shipping cost issue. Or maybe their "Buy Now" button isn't the right shade of orange.

But sometimes the real problem is hiding where most never think to look.

Let me tell you a quick story about ASOS that perfectly illustrates this point.

The Problem Nobody Saw Coming

ASOS is an ecommerce giant in the UK. Beautiful website. Custom product imagery. Streamlined checkout process. All the boxes checked.

Yet in 2018, they discovered a strange pattern: customers would load their carts with items... then vanish without purchasing.

The conventional wisdom would say: "Simplify the checkout!" or "Add more payment options!"

But when ASOS dug into their data, they discovered something far more interesting.

The REAL Reason Carts Were Being Abandoned

It wasn't about the checkout flow or payment friction.

The real issue? Customers didn't trust the sizing.

Think about this: when you can't try clothes on, you're basically gambling with every purchase. And people HATE being wrong.

This uncertainty was paralyzing customers at the final step. They'd rather abandon a cart than risk ordering the wrong size and dealing with returns.

The Million-Dollar Solution

Instead of wasting resources redesigning their checkout page (which would have done nothing), ASOS created something brilliant: the Fit Assistant.

This tool analyzed previous purchase data and body measurements to recommend the perfect size for each customer. Simple concept. Massive results.

By solving the ACTUAL problem (size uncertainty) rather than the PERCEIVED problem (checkout friction), they unlocked millions in revenue that was literally sitting in abandoned carts.

The Lesson You Can Apply Today

This is why I constantly preach about being data-obsessed. The obvious solution is rarely the correct one.

Most businesses would have A/B tested button colors for months without addressing the real problem.

ASOS succeeded because they:

  • Looked beyond surface-level metrics

  • Found the actual point of friction (size uncertainty)

  • Built a targeted solution that addressed customer fear


Your Business Application

Ask yourself: What are customers ACTUALLY uncertain about before purchasing from you?

Is it:

  1. Product quality?

  2. Whether it will solve their problem?

  3. If they're making the right choice?

Once you identify the TRUE source of hesitation, you can build mechanisms that eliminate that uncertainty.

Remember: Customers don't want more options. They want more CONFIDENCE in their decisions.

Give them certainty, and watch your conversions skyrocket.