Marbra Turns Sizing Uncertainty into Sales with Brarista's Conversational AI Bra Fitting Chatbot

We are back with another launch announcement with a maternity brand - except for this time, it's with our brand new Mini Chatbot. Brarista is proud to announce our newest partnership with Marbra, the leakproof nursing bra brand built for the realities of breastfeeding. Founded in 2023 by Caroline Rowland, Marbra was born from a gap that most lingerie brands simply weren't acknowledging: that nursing mums needed a bra that could do the job of disposable pads, without the bulk, the waste, or the compromise on fit.

Caroline's own experience returning to work at three months postpartum, still breastfeeding, and leaking through her clothes, became the blueprint for the brand. What makes Marbra distinctive isn't just the engineering of the product itself, but the thinking behind how they size it. Across their range, sizing varies by product to reflect how each style fits and functions, with some styles using an intuitive 0-4 system designed to acknowledge that pregnancy and postpartum bodies change in ways that don't always translate neatly to a standard size chart.

As Caroline puts it:

"As a founder who created Marbra because of my own leaking and sizing frustrations, I know how vulnerable bra shopping can feel during pregnancy and postpartum. We introduced Brarista to remove doubt and give women more confidence when choosing their size online. I wanted our customers to feel guided and reassured, not overwhelmed, and to make the experience feel as supportive as our bras."

Building the right foundation: a size chart overhaul

Before integrating Brarista to the shopping experience, there was groundwork to do. And for Marbra, that groundwork was more complex than it might appear from the outside.

Marbra uses six different sizing systems across their products, including 0-1-2-3-4, XS/S, S-M-L, and other conventions. Each product also has its own separate size chart, which means a shopper trying to find their size across multiple styles would need to visit each product page individually, cross-reference a different chart each time, and make sense of sizing logic that isn't consistent from one product to the next. For a customer who is already navigating the uncertainty of a postpartum body, that is a significant amount of friction to overcome before they have even added anything to their basket.

Working with the Marbra team, we mapped each of the six sizing systems against Brarista's fitting logic, translating every product's size range into recommendations that reflect how each style actually fits. Where measurements fell between two sizes, we consulted Caroline directly to make sure the call was right for her product and her customer.

Introducing the Mini Chatbot to the Marbra experience

For the integration itself, Marbra uses Brarista's Mini Chatbot: a lightweight solution that embeds directly above the add-to-cart button on product pages, designed to deliver quick, product-specific answers that go beyond size and fit. Shoppers can ask about fabric composition, care instructions, whether a style works under a specific outfit, or how a bra compares to one they already own. The Mini Chatbot removes friction at the exact moment it matters most, the point at which a shopper has found a product they're interested in and needs one more nudge of confidence to commit.

For a brand like Marbra, this is particularly well-suited. Shoppers arriving at the site are often navigating a significant life stage, and they may never have bought a nursing bra before. They may be unsure how their size has changed, uncertain about what "0-4" means for their body, or simply anxious about buying the wrong product. That kind of hesitation is exactly what the Mini Chatbot is built to resolve.

Stemming from the thorough size chart overhaul, a shopper can now have a single conversation with the Mini Chatbot and receive the correct size recommendation for any Marbra product, without having to navigate between pages or decipher multiple charts.

Caroline describes the fit-first experience it creates:

"The conversational size recommendation stood out most. It feels human and reassuring, which aligns beautifully with our brand. I was also pleasantly surprised by how much it helps educate customers about their changing bodies. That added layer of support makes a real difference for our community."

Early results

Marbra launched with Brarista at the end of January 2025. While it's early days, the initial data is encouraging.

Shoppers who engage with Brarista are spending significantly more per order. Average order value for Brarista-assisted sessions is £58.16, compared to a site-wide average of £43.12 across the same period, a 35% difference. A shopper who has received a fitting recommendation and had their doubts addressed is a fundamentally more confident buyer.

On checkout intent, the difference is sharper still. Conversation-to-checkout rate via Brarista sits at 5%, against a site conversion rate of 0.08% across the same window. That's a 62x difference.

What made this partnership work, beyond the product itself, was a shared understanding of who Marbra's customer is. Fitting for nursing mums isn't the same as fitting for everyone else. It requires sensitivity to the emotional dimension of postpartum shopping, and to the fact that many of these customers are navigating sizing for the first time in a new body.

Caroline reflects on the process:

"It felt collaborative from the beginning. The team really listened to our needs and understood that our customer is going through a very specific stage of life. Communication was clear and thoughtful, and it felt like we were building something together rather than just installing a tool."

Together, Marbra and Brarista are changing what fit guidance can look like for nursing mums online, bringing the kind of reassurance that used to only exist in-store to every product page, at any hour, in any size. The collaboration not only empowers shoppers to choose better-fitting bras, but also reduces unnecessary returns, which is a win for customers, retailers, and the planet. As both brands continue to grow, this partnership stands as a reminder that innovation and empathy can, and should, go hand in hand.

About Brarista

Brarista is the world's first AI-powered bra fitting chatbot platform designed specifically for lingerie retail. By merging advanced AI technology with professional bra fitting expertise, Brarista revolutionises the online shopping experience and tackles the long-standing challenge of incorrect bra sizing, which affects 90% of consumers and drives dissatisfaction and sales drop-off.

Unlike generic chatbots or simple measuring tools, Brarista offers deep lingerie specialisation — combining professionally graded fitting quizzes, deep learning algorithms, and large language models to democratise expert fitting services at scale. It delivers round-the-clock, personalised, brand-agnostic sizing recommendations through B2B2C white-label software embedded directly within retailers' websites, free to end-users.

Book a demo to discover how Brarista's AI bra fitting chatbot can help you turn sizing uncertainty into sales.