#1 AI sizing toolfor fashion

Smart size recommendations, virtual try-on, and AI-powered size guides for fashion stores & e-commerce websites.
Reduce returns by 35% with accurate fashion sizing technology.

+0%

Accuracy

-0%

Returns

+0%

Conversion

app-dashboard
Main Features

Save up to 35% on return costs

Powerful AI tools designed to enhance your operations, boost customer satisfaction, and drive sustainable growth.

Perfect fit. Every time.

Empower your customers with AI-driven fitting tools that eliminate size guesswork. Increase conversions and reduce returns by ensuring each shopper finds their perfect size immediately.

They see it. They buy it.

Revolutionize shopping with Virtual Try-On. Empower customers to visualize products on their virtual twin, boosting confidence and excitement for every purchase.

Less click. More engagement.

Create seamless shopping journeys with personalized recommendations, automatic size, and color selection. Build trust and loyalty at every touchpoint.

Know them. Delight them.

Understand your customers like never before. Use advanced analytics to predict trends, personalize interactions, and create lasting connections.

Savings Calculator

Estimate your savings

Input the information below to estimate your monthly savings.

2,500+ brand today, many more tomorrow.

RalphLauren
Jacquemus
Celio
COS
Wacoal
Gant
Patagonia
ArmaniExchange
Pull&Bear
Bershka
PrettyLittleThing
Scotch&Soda
Chantelle
Uniqlo
KWay
Decathlon
TheNorthFace
Nike
MarcOPolo
TheKooples
Aigle
Merrell
UnderArmour
Etam
LiuJo
Zadig&Voltaire
Ba&Sh
Carhartt
HellyHansen
Adidas
PeakPerformance
UGG
&OtherStories
MichaelKors
Diesel
Supreme
Columbia
Barbour
Abercrombie&Fitch
PrincesseTamTam
Lacoste
Converse
Cosmoparis
NewBalance
H&M
TommyHilfiger
Millet
Arena
Sézané
CanadaGoose
Calzedonia
Dr.Martens
Billabong
Monki
Levis
Asics
Salomon

Popsize Insights® for tailored experiences

With Popsize, your customers are no longer just shoppers—they’re individuals with unique preferences and needs. By leveraging data collected through the Popsize app, our widget delivers tailored solutions directly on your website, ensuring the perfect fit for every user.

Empower your brand with a smarter, more personal shopping experience that drives conversions, reduces returns, and builds lasting customer loyalty.

Welcome to the future of fashion, powered by Popsize.

+0k

Active users

+0

Data collected

+0%

Monthly user growth

Reviews

Don't just take our words for it!

star star star star star

“I’ve always struggled with finding the right size, especially with different brands. Popsize takes the guesswork out of it, and I love how it’s tailored to my body and preferences. It’s become a must-have for online shopping!”

John
Los Angeles, United States
star star star star star

“Popsize has completely changed the way I shop! It’s like having a personal stylist that knows exactly what fits me best. The confidence I get from knowing the size will be perfect is priceless.”

Alex
Paris, France
star star star star star

“One of my favorite feature of Popsize is to be able to have a friend's specific clothing size: perfect for a birthday gift. And it's accurate!”

Lea
London, United Kingdom
star star star star star

"I was skeptical about AI-powered sizing at first, but Popsize completely changed my mind. It's incredibly accurate and has made shopping stress-free. I can finally buy clothes online with complete confidence!"

Sophie
Amsterdam, Netherlands
star star star star star

“Popsize is a game changer! I no longer have to deal with the frustration of returns and exchanges. The recommendations are spot-on, and it’s like the app truly understands my body type and preferences. Highly recommend it!”

Esmeralda
Barcelona, Spain
star star star star star

“I’m amazed at how accurate Popsize is. The virtual closet feature is brilliant—I can plan outfits and even get inspired for what to buy next. It’s like having a stylist and a wardrobe organizer in one app!”

Anna
Lyon, France
star star star star star

“I used to waste so much time guessing sizes, but Popsize has made shopping easy and enjoyable. I especially love how it suggests the best fit for brands I’ve never tried before. No more trial and error!”

Luca
Roma, Italy
star star star star star

"Popsize has revolutionized my shopping experience! The AI perfectly understands my style and body type. I've discovered new brands I never would have tried before, and everything fits perfectly. It's like having a fashion expert in my pocket!"

Isabella
Florence, Italy
star star star star star

“The integration with my favorite brands is seamless. Popsize knows my measurements and style better than I do! It feels like a personal shopping assistant right in my pocket.”

Clara
Bruxelles, Belgium
star star star star star

“As someone with a unique body shape, I’ve always struggled to find clothes that fit well. Popsize’s recommendations are incredibly accurate, and for the first time, I feel confident ordering online.”

Elsie
Dublin, Ireland
star star star star star

“Popsize has saved me so much money on returns and exchanges. Plus, the confidence of knowing my purchases will fit perfectly is invaluable. It’s a must-have app for anyone who loves online shopping!”

Nico
Milan, Italy
star star star star star

“Popsize has made shopping so much easier! I no longer worry about ordering the wrong size online. The recommendations are spot-on, and I love how it learns from my preferences. It's like having a personal stylist!”

Maya
Berlin, Germany
star star star star star

“The size recommendations are incredibly accurate! I used to return 40% of my online purchases, but with Popsize, I've only returned one item in the past year. It really understands my body type and style preferences.”

Emma
Stockholm, Sweden
star star star star star

“The size recommendations are incredibly accurate! I used to return 40% of my online purchases, but with Popsize, I've only returned one item in the past year. It really understands my body type and style preferences.”

Emma
Stockholm, Sweden
star star star star star

“We’re looking for people who share our vision! most of our time used to be taken up by most of alternate administrative work whereas now we can focus on building out to help our employees.”

star star star star star

“What stands out for me is how Popsize combines practicality and style. Not only does it recommend the right size, but it also takes my style preferences into account. Shopping feels more personal now!”

Freya
Copenhagen, Denmark
star star star star star

“My favorite thing about Popsize is the gifting feature. I’ve always struggled with buying clothes for my partner, but now I can see their exact sizes. It’s taken the stress out of gift shopping completely!”

Mateo
Paris, France
star star star star star

“The integration with my favorite brands is seamless. Popsize knows my measurements and style better than I do! It feels like a personal shopping assistant right in my pocket.”

Clara
Bruxelles, Belgium
star star star star star

“As someone with a unique body shape, I’ve always struggled to find clothes that fit well. Popsize’s recommendations are incredibly accurate, and for the first time, I feel confident ordering online.”

Elsie
Dublin, Ireland
star star star star star

“Popsize has saved me so much money on returns and exchanges. Plus, the confidence of knowing my purchases will fit perfectly is invaluable. It’s a must-have app for anyone who loves online shopping!”

Nico
Milan, Italy
star star star star star

“Popsize has made shopping so much easier! I no longer worry about ordering the wrong size online. The recommendations are spot-on, and I love how it learns from my preferences. It's like having a personal stylist!”

Maya
Berlin, Germany
star star star star star

“The size recommendations are incredibly accurate! I used to return 40% of my online purchases, but with Popsize, I've only returned one item in the past year. It really understands my body type and style preferences.”

Emma
Stockholm, Sweden
star star star star star

“The size recommendations are incredibly accurate! I used to return 40% of my online purchases, but with Popsize, I've only returned one item in the past year. It really understands my body type and style preferences.”

Emma
Stockholm, Sweden
star star star star star

“We’re looking for people who share our vision! most of our time used to be taken up by most of alternate administrative work whereas now we can focus on building out to help our employees.”

FAQs

Frequenlty Asked Questions

Still have a question?
  • How does Popsize integrate with my e-commerce website?

    Popsize integrates seamlessly through a lightweight widget or API. Our team supports all major platforms (Shopify, PrestaShop, WooCommerce, Mirakl, etc.) and custom tech stacks. Integration typically takes less than a day and requires minimal technical effort from your side.

  • What results can I expect after implementation?

    On average, Popsize clients see −35% fewer returns and +25% higher conversion rates within the first months. These gains come from our AI’s precision in recommending the right size for each shopper and increasing buyer confidence.

  • Is Popsize available in white-label?

    Absolutely. Popsize can be fully white-labeled to match your brand’s design system, tone, and visual identity — from logo to color palette and typography. Our widget adapts dynamically to your UX.

    Request a demo
  • How is Popsize different from other size recommendation tools?

    Popsize stands out for five key reasons:


    • Proprietary AI models: Developed in-house, trained on millions of body–product–fit data points for unmatched precision.

    • A new approach to sizing: Instead of using height, weight or age (like standard BMI-based tools), Popsize analyzes what’s already in a shopper’s closet to understand their true fit — with no need for photos or body scans.

    • Consumer-centric design: We prioritize user experience, with zero intrusive body scans or manual measurements.

    • Omnichannel capability: Popsize unifies your fit data across web, mobile, and retail.

    • Measurable ROI: Full analytics dashboard tracking impact on conversion, returns, and engagement.
  • How can I try Popsize for my brand?

    You can start with a free trial or A/B test on selected product pages. Our team will guide you through performance setup and measurement.

    Request a demo

Our partnersthat trust us

French Tech Grand Paris
Google
CCI Paris
Hook VC
Club Tonic
Oxalla
Kornette
Team

From passionate founders,to expert builders

At Popsize, we believe that innovation is driven by a blend of expertise, passion, and vision. Our team is led by two co-founders with complementary backgrounds:

Christopher Ly
Christopher Ly
Co-founder | CEO
Christopher Ly LinkedIn
Christopher Ly
Nicolas Micaux
Co-founder | CTO
Nicolas Micaux LinkedIn
Christopher Ly
Hugo Sinprasith
Full Stack Engineer
Hugo Sinprasith LinkedIn
Christopher Ly
Marie-Solen Gouy
Advisor | CEO @clubtonic
Marie-Solen Gouy LinkedIn
Christopher Ly
Aline Mandran
Advisor | Strategy @BCG
Aline Mandran LinkedIn
Christopher Ly
Pierre Luu
Advisor | Marketing Lead @Amazon
Pierre Luu LinkedIn
ClosetIcon We’re hiring

The future of fashion starts here

Our AI-driven approach is transforming how fashion fits into our lives, making every shopping experience personal, precise, and sustainable.

Shoppers

Discover a new way of fashion shopping with an intuitive and smart app

Brands

Unlock the full potential of your brand with AI-powered precision