In a world where children outgrow their clothes at lightning speed, Wunder Duds is challenging the throwaway culture with a refreshing, design-led approach to pre-owned kidswear. Founded by Lyndsey Diamond, whose two decades in luxury fashion underpin the brand’s creative ethos, Wunder Duds blends style, sustainability, and a sense of wonder into every garment. CWB’s Laura Turner discovers the inspiration, ethos and unique business model behind the platform that’s turning second-hand shopping into an aspirational experience for modern families.

 

Laura Turner: Can you share your professional background and what led you to start Wunder Duds?

Lyndsey Diamond: My background is in design – I spent over 20 years working in fashion at a luxury level, leading creative teams and consulting globally with both startups and established fashion brands. When I became a mum, I saw firsthand how quickly kids outgrow clothes and how much waste that creates. Back in 2020, I noticed there wasn’t a platform that made reselling kids’ clothes feel inspiring or elevated – most options felt like jumble sales online, so I launched Wunder Duds to change that, blending my design expertise with a mission to make pre-owned kidswear stylish, sustainable, and fun for families.

LT: What inspired the business name?

LD: Naming the business felt the same as naming a child – you want it to carry meaning and personality. I kept coming back to the idea that there’s ‘wunder’ to be found in things someone else no longer needs. ‘Duds’ is slang for clothes, but also for something considered useless. I liked flipping that on its head: Wunder Duds is about rediscovering the magic in what might otherwise be overlooked.

LT: Can you describe your business model and how Wunder Duds works?

LD: At its core, we’re a resale platform. We source pieces ourselves and also work on a consignment model, collaborating closely with families to help them sell their children’s clothes. We select items based on style, quality, character and what resonates with our community, featuring brands such as Mini Rodini, Tiny Cottons, Angulus, Hello Simone and Bobo Choses. Each piece is then photographed, styled, and listed on our site, so that shopping pre-owned kidswear feels just as exciting and desirable as buying new.

 

 

LT: How do you determine which items are accepted for resale on your platform, and what is your quality control process?

LD: We carefully select pieces that are full of character and personality, just like the children who’ll wear them. Every item must be joyful in spirit and durable enough to enjoy multiple lives. Each piece goes through a thorough inspection, with washing or mending if needed, before being styled and presented so it looks as inspiring online as it does in person.

LT: How do you encourage children to express their individuality and creativity through fashion via Wunder Duds?

LD: Clothes are a brilliant canvas for self-expression, and one of the most powerful ways to help children feel confident is by letting them wear pieces they genuinely love. Wunder Duds isn’t about following trends; it’s about celebrating personality. Through our curated styling and selections, we highlight playful combinations and unique pieces that spark imagination. This comes to life in The Edit, where we showcase inspiring looks created entirely from pre-owned kidswear.

LT: What have been your biggest challenges in scaling a childrenswear resale platform, and how have you overcome them?

LD: One of our biggest has been balancing growth with curation, while also raising awareness in the competitive childrenswear market. It’s tempting to prioritise volume and scale quickly, but I’ve always wanted Wunder Duds to feel intentional and elevated. We’ve tackled this by refining our intake process, improving our photography, and creating editorial-style imagery that celebrates the joy of dressing kids sustainably. This consistency has built trust with our community, who know they’ll always discover something special when they shop with us.

LT: What do you see as the biggest business opportunities and challenges for the future of pre-owned kids’ fashion?

LD: The opportunity in pre-owned kidswear is enormous. Children outgrow clothes far faster than adults, creating constant cycles of replacement and waste, which highlights the sector’s potential for sustainable impact. The challenge lies in standing out against the convenience and appeal of fast fashion and the growing number of players in resale. At Wunder Duds, we believe the way forward isn’t speed or scale alone, but loyalty, trust, and impact. By making pre-owned kidswear aspirational and design-led, we aim to help families see it not as a compromise, but as a natural first choice, setting a new benchmark for style, sustainability and creativity in children’s fashion.

 

 

LT: What makes the Wunder Duds shopping experience unique compared to other children’s resale businesses?

LD: Our approach is different: we treat pre-owned kidswear with the same creativity and care as new. We don’t just list clothes to bulk up our offering, we reimagine them. We thoughtfully curate with intention, style, and photograph them through an editorial lens. The result is a shopping experience that feels inspiring, not overwhelming. Our families value the ease and style, while the kids love wearing the pieces that feel unique, joyful, and celebrate individuality instead of blending into the crowd.

LT: Could you share any key milestones or achievements since launching Wunder Duds?

LD: Every day feels like a milestone – we’ve grown organically from a kitchen table idea with no outside investment into a trusted platform with a loyal returning community. Along the way, we’ve been featured in The Sunday Times Style Magazine, mentioned on the BBC, recommended by the lovely Pandora Sykes, were finalists at The Drapers Conscious Fashion Awards, and hosted our premier pop-up alongside The Playground Project at Coal Drops Yard. But the milestone I’m most proud of is seeing families return again and again, because that shows the clothes aren’t just being resold, they’re being genuinely loved.

LT: Finally, where do you envision the business in the next five years?

LD: The journey forward for Wunder Duds is about sustainable growth while staying true to our values of curation, quality and individuality. We aim to continue building and nurturing a community of fashion-conscious families where thoughtfully designed, sustainable kidswear is celebrated, creativity is encouraged, and every interaction leaves a lasting impression. Building on the success of our premier pop-up, we are exploring further pop-ups and a permanent physical hub, spaces where children and parents can discover, experiment, and engage with fashion in thoughtful, imaginative ways, making pre-owned kids’ fashion not just a choice, but a celebrated part of family life and creativity.