Intersport DK’s success: driving conversion and cutting returns with Faslet

In this case study, we examine how Faslet’s smart sizing technology helped Intersport DK achieve measurable improvements in both online conversion rates and return volumes. Through a controlled A/B test, we evaluated the direct impact of offering personalised size advice to online shoppers comparing groups with and without the Faslet button.

about Intersport

Intersport DK is one of Denmark’s leading sports retailers, offering an extensive range of performance apparel, footwear, and outdoor gear. With a strong e-commerce presence alongside their physical stores, Intersport DK is committed to providing customers with a seamless and confident online shopping experience. Getting the right fit is central to that commitment particularly across the varied sizing standards of the many international brands they carry.

the challenge

Like many online sports retailers, Intersport DK was experiencing elevated return rates driven by size uncertainty. These returns placed pressure on logistics and customer service operations, while also creating friction in the post-purchase experience. The goal was clear: reduce sizing-related returns and give shoppers the confidence to complete their purchase the first time.

the approach

Over a defined test period, Intersport DK ran a structured A/B test to measure the real-world impact of Faslet’s size recommendation widget. Shoppers were split into two groups: Group A was shown the Faslet personalised size advice button on product pages, while Group B browsed without it. All other variables pricing, product range, promotions remained constant, isolating the effect of size guidance on shopper behaviour.

the results

The results of the test were clear and commercially significant:

  • Increase in conversion
    Intersport DK saw a 5.3% uplift in conversion rates among shoppers who interacted with Faslet’s smart sizing tool, reflecting a meaningful increase in purchase confidence and reduced hesitation at the point of decision.
  • Reduction in return rates
    The introduction of personalised size advice led to a 15% reduction in returns a significant improvement that points directly to better fit accuracy and a higher-quality purchase decision.
facts
0%
more conversions
0%
less returns

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