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Sell on Happy Size: Grow on Europe's top inclusive fashion platform

Founded on the promise of “plus size without compromise,” Happy Size is quickly becoming the leading online destination for plus-size fashion. With 2 million monthly store visits, this growing marketplace connects partner brands with new customers every day.

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Grow on Europe’s leading inclusive fashion platform

Inclusive fashion isn’t the niche market it once was. In fact, today’s plus-size fashion industry is growing rapidly, with the European market alone reaching 75.3 billion euros in 2023. As this value is projected to exceed 100 billion by 2030, platforms like Happy Size are working effectively to connect plus-size brands with their growing customer base.

What’s behind this rapid growth? Rather than settle for scaled-up versions of standard sizes, fashion-conscious shoppers look for designs that fit, flatter and celebrate their body. For brands seeking a longer market shelf-life, that means not only creating stylish, accessible options but delivering a customer experience that shows they truly understand their customers.

Since joining the Popken Fashion Group in 2024, Happy Size has grown into Europe’s leading marketplace for inclusive fashion. With over 30,000 curated pieces and customers across Europe, Happy Size introduces brands to a loyal, growing audience of millions. 

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Learn more about Happy Size’s focus on partner brand success from Benjamin Schneider, Head of E-Commerce and Brands at Happy Size.

Standing out on a platform like Happy Size

In today’s competitive fashion landscape, success in the plus-size market requires far more than simply extending size ranges. Customers expect style, reliability, and a seamless shopping experience that reflects a true understanding of their needs. For partners looking to grow with Happy Size, this comes down to four essentials:

Assortment that inspires

Plus-size hoppers are no longer satisfied with scaled-up versions of standard clothing. They want fashion designed for them, and that means on-trend, flattering, and thoughtfully constructed

Happy Size curates collections that reflect this, with women’s lines sized up to EU 64/66 and offering balanced proportions. Men’s ranges are available up to EU 82 and designed with relaxed fits, extended fronts, and longer sleeves. These details not only enhance style, but also ensure products feel designed specifically for larger bodies, rather than an add-on to a standard collection.

Assortment that inspires

Plus-size hoppers are no longer satisfied with scaled-up versions of standard clothing. They want fashion designed for them, and that means on-trend, flattering, and thoughtfully constructed

Happy Size curates collections that reflect this, with women’s lines sized up to EU 64/66 and offering balanced proportions. Men’s ranges are available up to EU 82 and designed with relaxed fits, extended fronts, and longer sleeves. These details not only enhance style, but also ensure products feel designed specifically for larger bodies, rather than an add-on to a standard collection.

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How to be more profitable with Happy Size

Take a closer look at how Happy Size helps inclusive brands grow at a scalable pace, and find out how to get started with our step-by-step onboarding checklist.

Read it now

In-house engagement that drives growth

Through opportunities like retail media and CRM, Happy Size offers partners the chance for an instant visibility boost and real sales momentum. Whether showcased via app or desktop, or highlighted in Happy Size newsletters, brands can access a highly responsive audience with proven results. For example, with more than 300,000 active newsletter subscribers, featured brands can see a 20–30% conversion uplift

Experience that delivers on expectations

A positive shopping journey is as important as the products themselves. Brands can set themselves apart from competitors on Happy Size by focusing on high-quality product imagery and detailed descriptions. By highlighting articles with elevated, informative content, customers are engaged in a way that builds trust  and satisfaction – and reduces return rates, too.

Availability backed by strong operations infrastructure

Few things disrupt customer trust more than cancelled orders or unavailable sizes. By managing a unified stock pool and focusing on real-time replenishment, partner brands can maximise visibility on Happy Size and demonstrate reliable accessibility to customers. After all, brands can’t make a sale if the customers can’t find what they want, when they want it. 


One main thing that really makes a difference is actually stock. We take care of the traffic. You just need to make sure your product is there and available.

Benjamin Schneider,
Head of E-Commerce and Brands, Happy Size

Innovating today for tomorrow’s customers

Happy Size’s success isn’t only built on assortment and availability. As the inclusive fashion market expands, so do the needs and expectations of customers. The platform continues to invest in innovation that improves the shopping experience for customers and simplifies processes for brands. 

For example, AI-powered image recognition at Happy Size maps each product photo to 30-40 style attributes–covering everything from fit and cut to patterns, colours, and occasions. These attributes are then turned into filters in the online shop, giving customers far more precise and relevant ways to search and discover products, while reducing manual onboarding work for the brands.

Backed by intelligent infrastructure and a customer-forward mindset, brands and customers can make the most of Happy Size to enjoy smarter online shopping.

The future of fashion is inclusive

As Europe’s inclusive fashion market is already worth tens of billions and continuing to grow, the opportunity for plus-size brands is clear. Now is the time for partner brands to seize on this potential and transform it into real, tangible profits – all made easier by working with the right platform.

With a commitment to partner growth and a premium shopping experience, Happy Size offers a pathway to success that is scalable, sustainable and, most importantly, inclusive.

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