Size & Fit
The size recommendation tool your e-commerce store and your customers will thank you for.
Eliminate sizing uncertainty with personalized recommendations: fewer returns and abandoned carts, plus more conversions and repeat customers.
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Size recommendations that revolutionize the online shopping experience.
Easy to use

Users input their data in just two steps.
Simple and personalized

Next, users simply confirm or personalize the generated body shape.
Accurate recommendations

Consumers receive their ideal size recommendation and can see how other sizes will fit them.

For Clothing
Make sure your customers purchase the right size with only their height, weight, and age.
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For Footwear
Help your customers instantly find the perfect fit by analyzing foot shape and past size preferences across different brands.
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Size Charts
Display individual size charts for each product, managed automatically and effortlessly.
Learn moreEnhance your online store with Size & Fit
More conversions
Brands that use Sizebay see a 50 to 150% higher conversion rate in sessions that use the tool.
Fewer returns
Returns can be reduced by as much as 50% when shoppers pick out the right size.

Fewer abandoned carts
Did you know that 33% of store visitors abandon their cart because of sizing uncertainty?
More repeat purchases
By providing more assertive shopping experiences, customers are encouraged to make repeat purchases.
Structured solutions to overcome your challenges
In addition to our size recommendation tool, our team will work closely with you every step of the way, from implementation to performance analysis.
Pattern Making and Review
Our team includes fashion experts who’ll consult with you to create and manage your store's size charts, from initial set up to monitoring results and size recommendations.
Technical Support and Customer Success
We have a team of professionals dedicated to monitoring the performance of Size & Fit in your e-commerce store. When we identify new opportunities, we create new resources, integrations, or incredible and exclusive experiences for your store. Share your ideas, and together we'll design features and integrations that'll provide your customers with a unique experience.
Data Analytics and Reports
In real time, we offer a suite of data analyses and reports based on the data collected by Size & Fit, which can be accessed directly from our dashboards. Alternatively, we can send all collected data directly to your analytics services such as Google Analytics or Adobe Analytics.


Trusted by big brands
Loved by growing brands


The best decision is in your hands
Compare the main size recommendation tools on the market.
Comparison of Tools
Size & Fit Sizebay
Size advisor 1
Size advisor 2
Size advisor 3
Size advisor 4
Size Recommendation
Our size recommendation tool is integrated into fashion e-commerce stores where it determines users' body measurements which can be further personalized to provide accurate size recommendations.
Size Charts
Size charts complement Size & Fit. They give shoppers the option of picking out the right size by comparing their body measurements with the clothing measurements that are updated and organized by the Sizebay team.
Fit Analysis
This is a unique feature that gives online shoppers the option to choose their preferred fit, taking into consideration if they prefer tighter or looser clothing. The fit analysis displayed by our comfort bar adds greater personalization to Size & Fit.
Kids Sizing Recommendation
Size & Fit can provide size recommendations for kids sizes.
Footwear
Size & Fit recommends ideal shoe sizes in two ways. The first is by comparison, which requires users to enter the brand and size of a shoe they already wear. The second option requires users to measure their feet to receive a recommendation.
Lingerie
Sizebay also recommends sizes for lingerie, using the same user experience as for clothing.

Discover how Sizebay can streamline your workflow
Schedule a DemoHow to implement Size & Fit
Consult with our experts to choose the best plan that suits your store
Validation or creation of size charts and personalized configurations for your store
Implementation and review, monitored by an account manager.
Your e-commerce store is now upgraded with size recommendations and access to analysis and reporting features.
Fast and easy
Don’t worry, 95% of the work will be done by our team.

Got questions? We’ve the answers
What is Size & Fit?
Size & Fit is a size recommendation tool that can be installed in e-commerce stores. It uses user-inputted data to make the experience of finding the right size closer to the in-store experience.
What kind of size recommendation tool is Size & Fit?
Size & Fit is an anthropometry-based recommendation tool that recommends sizes for clothing (women’s, men’s, children’s, and plus size) and footwear.
How does Size & Fit work?
Users enter their weight, height, and age. Using anthropometric data, Size & Fit estimates up to 7 body measurements with great precision, and users validate body mass distribution. The size recommendation algorithm cross-references body mass distribution data and information from size charts to provide size recommendations specific to each user’s body measurements.
How does Size & Fit work for footwear?
Users enter the brand of footwear they usually wear and the type of footwear they wear most. With this information, the tool understands the shape of the user’s foot, be it narrow, regular or wide. Next, the user enters their size which is cross referenced with product measurements to generate size recommendations.
What plans are available?
Our plans are personalized and suited to the size of your online store. To serve you, we have plans ranging from XS to XXL, and personalized plans.
How can I contract Size & Fit?
Contact the Sizebay team to schedule a no-obligation demonstration of the tool. During the demo, we’ll show you how Size & Fit can meet the needs of your e-commerce store.
How do I integrate Size & Fit into my e-commerce store?
Size & Fit can be integrated with a single line of Javascript, included directly in code via Google Tag Manager (GTM). We use XML (Google Merchant Center Pattern) or synchronization via API.
How long does it take to integrate Size & Fit?
On partner e-commerce platforms, implementation is native, just add Size & Fit to your store and start using it. For other platforms, once our team has contacted you for the necessary information, implementation takes place in a maximum of 30 days, depending on the size of your store.
Who is Size & Fit for?
Size & Fit can be used by online stores of all sizes, from XS to XXL, with personalized plans based on each store’s demands. To add Size & Fit to your store, just schedule a demonstration or contact our team on our website.
Which e-commerce platforms have native integration?
On the Nuvemshop platform, we offer a native app that enables fast and seamless integration in just a few clicks. For VTEX IO, we provide a module that can be installed via the command line, ensuring a stable, efficient, and easy-to-execute setup.
For other platforms, we develop a custom script tailored to your store. Depending on your preference, implementation can be done either through GTM (Google Tag Manager) or directly in the page’s HTML.
We use different methods to capture product data. The most common are XML feeds following the Google Shopping standard and on-page integration, which extracts information directly from the product page.
No matter the platform, our team has extensive experience across various e-commerce environments and is ready to support you at every step of the integration process.
