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Asos Case Study: How product images can impact conversions

Product images can play a critical role for every e-commerce company that seeks to increase its conversion rates and engagement.

Written by Jim Raptis

Sep 1, 2019 • 6 min

Asos Case Study: How product images can impact conversions

ASOS is the undisputed champion of online fashion, boasting over 50,000 branded and own label product lines across womenswear, menswear, footwear, accessories, jewellery, and beauty.

Its online platform works by choosing the best fashion items from a variety of brands and grouping these items with the company’s products.

Landing Page of
Landing Page of

Then, the optimization of ASOS’ platform (or any e-commerce company) is highly essential. Minor UI changes can taper the conversion funnel and cost millions in losses to the company.


The numerous product images closely connect to the ASOS conversion rates.

MIT neuroscientists proved that the brain can identify images seen for as little as 13 milliseconds. This greatly illustrates the importance of optimizing product images!

Furthermore, an excellent visceral design makes us feel at least something, hopefully making us happy and ideally getting us excited. In his book Designing for Emotion, Aarron Walter explains that we know ourselves so well that we try to relate everything we see to ourselves.

We know ourselves so well that we try to relate everything we see to ourselves

Therefore, each product image (including both the product and the model) tells a unique story and waits for a user to relate to it. These images build a strong and lasting connection between the user and the brand.

Numerous options for any kind of product type.
Numerous options for any kind of product type.

Thus, our challenge is as simple as that:

Which product photo is the most engaging to optimize the customer buying process?
notion image

The goal is to find out which product image increases the attention of the ADD TO BAG call to action button along with the product visibility itself.

The product under investigation is the following:

👗 Missguided Jersey shirt dress in white

Traditional Method

Usually, the process includes User Testing or A/B testing by sourcing people from an external tool like UseBerry, UserFeel, or UsabilityHub, or by gathering your unbiased colleagues/friends’ feedback.

We’re going to focus on A/B testing because it’s an excellent way to measure user response to small tweaks. A/B testing provides clear, quantitative results when conducted successfully.

notion image

However, there are two primary bottlenecks:

  • The amount of audience sourcing required.
  • The time it takes until the results are available.

New Method

Let me introduce you to the successor of traditional A/B testing! The method is called predictive design:

Predictive design is a commonly used statistical technique to predict future behavior. Predictive design solutions are a form of data-mining technology that works by analyzing historical and current data and generating a model to help predict future outcomes. In predictive design, data is collected, a statistical model is formulated, predictions are made, and the model is validated (or revised) as additional data becomes available.

Learn more about it here 👈


We’re going to use a new predictive design tool called VisualEyes. The tool gets an image as input and generates an Attention Heatmap. It helps us understand the correlation between user attention and, in this case, the product image.

All we need is a prototyping tool like Sketch, AdobeXD or Figma and use the corresponding plugin. The tool gives us the following results:

  1. Attention Maps depict where the users’ attention goes.
  1. The VisualEyes plugin allows the definition of a polygon Area of Interest (A.O.I.) inside your design that measures the average attention.
    1. An example of AOI definition.
      An example of AOI definition.


The choice of this product is not a random one. The absence of a brand and the placement of the model will help us generate some mind-blowing results.

👗Missguided jersey shirt dress with back print in white
👗Missguided jersey shirt dress with back print in white

For each variation, we define the following three Areas of Interest (AOI) around:

  1. The Add to bag (red) call to action button
  1. The product’s additional information (green) section and
  1. The product (blue) itself
notion image
notion image
notion image
notion image

We use the VisualEyes plugin and after 3 seconds, the results are ready! ⏰

notion image

The winner of our A/B/C/D testing based on the results of VisualEyes tool is the #1 product image.

The key point for our selection is the combination of product and Call to Action visibility. The first image scored the highest product attention by catching 10.6% of the total customer attention.

🎉The winner product image
🎉The winner product image

However, why is that happening? The reason is quite impressive!

User Experience designer A.Walter describes in his book Designing for Emotion why we appreciate human faces so much. He explains that we are continually exploring the world around us by looking for something familiar. Familiarity gives us a feeling of comfort and reassurance. That’s the very first part of the subconscious process to capture your user’s attention.

Once you have caught your visitors’ attention, human faces are a great way to also guide their line of sight. This is happening because we are curious by nature and if other people look at something, we want to know what it is they are looking at.

Product image #1 is a textbook example of guiding the user’s gaze. In our case, this is employed to point the user towards the additional information of the jersey shirt dress and eventually lock her/his attention on the Call To Action button. The user’s attention has been subconsciously captivated and guided towards a button that prompts him/her to buy.

Last but not least, the winner image demonstrates precisely Hick’s Law.

The time it takes to make a decision increases with the number and complexity of choices.

The winner image simplifies the user choices by breaking down complex tasks into smaller steps. The user flow starts by looking at the product itself and continues to the model’s face whose line of sight guides the visitor to the additional information section. Subsequently, the user ends up in the *Add To Bag *button.

The designers at ASOS hacked the buying decision process of the customer victoriously! 🏆


The main takeaway for me is the importance of product images for any e-commerce company. These companies ought to understand the effect images have on the user and spend adequate time optimizing them.

The benefits not only can increase the attention to a specific element of the user interface but also make the customer relate to the product. Hence, the customer forms a special bond of trust with the brand itself. Once a consumer bonds to your brand, they’re more likely to make recurring purchases with no hesitation, which then bridges the gap between trust, loyalty, and brand recall.

Can predictive design be considered a panacea?

Have you ever heard people refer to themselves as “Apple people,” “Nike people,” or “Trader Joe’s” people?

This is what brand awareness can do for a brand: embed itself into people’s lifestyles and purchase habits so that consumers don’t have to think twice before becoming a customer, time and time again.

Brand awareness influences customers’ decision-making subconsciously. It doesn’t mean that the 13 milliseconds rule or the lust for familiar content don’t apply to these users too, but the emotional effect on their buying decision process is waning.

Ellesse brand visibility is predictable! But brand awareness is a little more difficult problem!
Ellesse brand visibility is predictable! But brand awareness is a little more difficult problem!

This is where predictive design currently fails but I firmly believe that running your predictive design tool with custom demographics will soon be available and will completely change the way people think about design.

As the famous Chinese-American machine learning scientist, Andrew Ng quoted:

It is difficult to think of a major industry that AI will not transform. This includes healthcare, education, transportation, retail, communications, and agriculture. There are surprisingly clear paths for AI to make a big difference in all of these industries.

AI will transform the design industry soon!

If you liked this post, you can follow me on Twitter where I share daily tips about bootstraping, product development, and UI/UX design tips.

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Jim Raptis

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