JUNK LDN Brings Expert Swimwear Fitting Online with Brarista's Conversational AI Chatbot

Brarista is proud to announce our newest partnership with JUNK LDN, coming at exactly the right time for hot girl summer. With the mission of making swimwear that makes you feel good and does good for the planet, their UK A-J cup bikinis and one-pieces are ethically made from ocean waste and recycled fabrics. Swimwear is the one thing in your wardrobe that shows the most of you in public, which makes sizing the last thing that can be an afterthought. Brarista was brought in to make sure that finding the right size and style online feels as considered as everything else the brand does.

“Our main goal was to reduce sizing inquiries made via email, DMs, and website chat that the team couldn't respond to instantly (primarily outside working hours) or that fell outside customer service knowledge, so that we could maximize our traffic and increase our conversion rate.”

- Celia Harper, Founder at JUNK LDN

A conversational shopping experience across the whole site

JUNK launched with Brarista's Full Chatbot, which sits across the site in JUNK's own voice and aesthetic, playful colour palette included, so the experience feels native to the brand rather than bolted on. It does three jobs a generic customer service tool or size finder can't: professional fitting, styling, and customer service. Here is how that plays out at each stage of the journey:

For shoppers meeting the brand for the first time, Brarista answers the questions that decide whether they drop off or stay: who JUNK is, how the swimwear is made, and most importantly, what their usual size would translate to in JUNK's own sizing. Sizing in swimwear or lingerie is granular enough that a single inch changes the fit, which is exactly why it needs industry-specific fitting expertise like Brarista's.

For shoppers on a specific product page, the questions get more sophisticated, and so do the answers. What size is the model wearing? How does this style sit on a longer torso? Which of these works if I want more coverage across the bust, or more support without an underwire? These are fitting room questions, and Brarista answers them the way a fitter and stylist standing next to you would.

"Brarista is the first fit AI + tool we have used because we could not find anything else to fill this gap for a long time."

- Celia Harper, Founder at JUNK LDN

Rewind - it all started with the size chart

Before any of that could work, we went through JUNK's sizing from the ground up, as part of Brarista’s nuanced onboarding process. Through a thorough assessment by Brarista's professional bra fitting team, we found that two cup sizes, H and HH, were missing from the published sizing progression. A generic fitting tool would have read the chart and worked with what it was given. Our fitters spotted the gap, which meant JUNK could go live catering properly for the fuller busted community that plays such an integral role in their identity.

Moreover, their one-piece sizes weren't linked to bra sizes on the site, so a shopper who knew they were a 32GG had nothing telling them which one-piece to pick. We built that mapping, so the quiz now returns their bra size and the one-piece size that corresponds to it.

"Being founded by women who understand bra fitting and the struggles of finding a good fit has been the best part, this is not something that exists anywhere else!"

- Celia Harper, Founder at JUNK LDN

The fitting-by-eye bra quiz, rebuilt for swimwear

Integrated within the Full Chatbot is Brarista's fitting quiz, which guides a shopper to their best bra size in around three minutes. It uses the fitting-by-eye method professional bra fitters use in store: a structured sequence of questions about how a current bra actually fits, rather than a tape measure or a formula that a general-purpose tool would use. Brarista's quiz is built by professional bra fitters and calibrated to JUNK's own grading, so what comes back is a JUNK size, not a generic one.

Our fitting quiz has been built through more than twenty beta projects with brands carrying some of the most demanding sizing systems in the industry, including entirely bespoke fitting for post-surgery, maternity and sports ranges. That established our expertise on the bra side. Swimwear needed its own, and JUNK gave us the perfect platform to build it with.

"The bra fitting quiz is quick and simple, helping customers find their correct bra size"

- Celia Harper, Founder at JUNK LDN

First is the bottom size quiz. Across our work in bikini tops and everyday lingerie, questions about briefs were never more than a tenth of the conversation. With JUNK, half of it was about matching bottoms. Size and style there carry the same weight as the top, and the logic behind them is entirely separate: hip and waist measurement, but also rise, coverage preference, and how a shopper wants the piece to sit. So we built a quiz that treats it as its own decision rather than something inherited from the size above.

Then the one-piece quiz. This has been on our roadmap for a while, and JUNK's Flora one-piece was the right place to start. One-pieces are the style most often abandoned online, because a band and cup recommendation doesn't answer the question shoppers are really asking. Torso length is the variable that band and cup sizing ignores entirely, and it gets complicated quickly in the fuller bust category. Take a 32GG. A 32 band usually sits alongside a UK 10 to 12 dress size, but plenty of fuller bust shoppers are a 32GG and a UK 16. So the quiz asks for height and dress size alongside bra size, and applies JUNK's own rules to reconcile them, so if shoppers are above a certain height and cup size the recommendation moves up a size. Another brand with a different view on torso length would get their own version of that logic, because no swimwear or lingerie brand has ever been too niche for us to build for.

"The Brarista team has been amazing and so helpful every step of the way! They always answered my questions quickly and resolved issues promptly."

- Celia Harper, Founder at JUNK LDN

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. Brarista isn’t just another chatbot; it is transforming how an entire industry approaches one of its most persistent challenges.

Book a demo to discover how Brarista’s bra fitting chatbot can revolutionise your lingerie shopping experience.