The real problem is a sizing experience that puts the burden on your shoppers.
They guess. They buy multiples. They return. Or they leave.
Zizr removes that burden entirely — and the numbers fix themselves.
Zizr is also used by some of the world's largest fashion retailers. We can't name them. But we can show you what they achieved.
Estimate what sizing-related returns may be costing your store every month — and what reducing them could mean for margin.
Based on an estimated cost of €25 per return and an average 28% reduction in return rate across Zizr stores. Actual results vary.
Returns are not just a logistics problem. They quietly erode conversion, margin, and customer confidence — especially when sizing is uncertain.
Most people won't tell a website how much they weigh. Those who do often guess or round up. That's not a data problem. It's human nature. When you ask for weight, most shoppers leave.
Two people with identical height and weight can need completely different sizes. Body shape, posture, brand-specific cutting — none of it is captured in two numbers. Height and weight was never enough information to recommend the right size.
You stop a shopper who is ready to buy and ask them personal questions. Conversion drops before they even add to cart. The tool designed to reduce returns is reducing sales instead.
Clothes aren't just functional — they're personal. Being asked to measure and categorise your body at the moment of purchase is uncomfortable for many shoppers. For some, it's enough to make them leave entirely. The best sizing experience is one the shopper never notices.
"While others ask shoppers to fit the system — Zizr fits the recommendation to them. Silently. Accurately. At the moment they're ready to buy."
Zizr understands sizing by analysing your product catalogue — not by questioning your customers. Every shopper gets a precise recommendation. No body measurements. No weight. No photos. Minimal friction.
Simple for your team. Sophisticated under the hood.
Add Zizr to your Shopify store and go live in under 60 minutes. No developers needed. No data migration. No catalogue work required.
Behind that one click is SKU-level modelling across millions of data points. Every product is mapped individually, not by brand averages or size-chart approximations, so Zizr can understand fit before your first sale.
New shoppers tell Zizr one thing they already own — a specific model and size they know fits well. That's it.
From that single reference point, Zizr maps their fit profile across your catalogue and recommends the right size for anything in your store — even across brands and categories. Returning customers get instant recommendations based on what they already bought and kept.
Because every product is mapped into a living global product catalog before your store has to generate its own history.
You might wonder: if no one has bought my products through Zizr yet, how can it recommend sizes?
The answer is our Global Product Catalogue — a continuously updated intelligence layer that maps how every product in our network actually fits in real purchases. Not what the label says. Not what brand guidelines suggest. What real customers experienced, returned, and gave FitBack on.
When a new product enters your store, Zizr places it in that map. Instantly.
Every product is placed in the Global Product Catalogue from day one. Zizr already understands how your products fit — by mapping them against everything we know about how similar products fit across millions of real purchases. No waiting period. No cold start.
Every purchase, return, and FitBack response across the entire Zizr network updates the model in real time. The more the network grows, the more accurate every recommendation becomes — including for your store.
Catalog Intelligence doesn't just help shoppers. It tells you which products in your assortment are systematically causing sizing problems — at the individual product level — before they become return problems. Use it for better buying, better supplier briefings, and better product development.
Every purchase, return, and FitBack response improves the model — not just for one store, but across an international retailer network.
You've seen it before: "30% fewer returns, 20% higher conversion." Those numbers come from averaging across stores, seasons, and categories. Zizr doesn't do averages. When Capone implemented Zizr, we tracked every transaction in real time — product by product, category by category, week by week.
First visible in denim and footwear — the toughest categories to get right.
Customers who trusted their size recommendation converted at significantly higher rates.
Post-purchase surveys showed shoppers praised fit confidence specifically.
"Partnering with Zizr has been a game-changer for Capone. Their sizing solution addresses one of the biggest pain points in online shopping. The results speak for themselves — our customers are happier, and our business is thriving."
Want to see this on your own products?
Zizr is also trusted by some of the world's largest fashion retailers. We can't tell you who. But we can show you what they achieved.
Install Zizr on your Shopify store and test it with your own catalogue and customers.
We’ll give you a full month of usage — free.
To get started, request your store-specific activation code.
Low-friction Shopify install. No developers needed.
One flat monthly price. No usage-based pricing. No limits on recommendations or catalog size.
For Shopify stores
Zizr is currently live on Shopify. If you're on another platform, get in touch to discuss options.
A size chart tells shoppers what sizes exist. Zizr tells them which one fits them. Those are different problems. A size chart shifts the decision to the shopper. Zizr makes the decision for them — accurately.
They didn't use it because you asked them for information they didn't want to share. Zizr requires nothing uncomfortable from your shoppers. No height. No weight. No body measurements. No photos. Just: what do you already wear?
Zizr has one price for everyone. The same technology that powers sizing for some of the world's largest fashion retailers is available to every Shopify store at a flat monthly rate. Size of store does not affect access. Only results.
Shopify is where Zizr lives today. If you're on a different platform, get in touch — we'd love to talk about what's coming.
Perfect, actually. Zizr doesn't need your data to start. Our Global Product Catalogue gives every new store accurate recommendations from day one — before a single sale. You're not starting from zero. You're starting from millions of data points.
Send us your store and we’ll show you how Zizr will appear on your product pages.