Menu
Request a Demo
Menu

Size Finder Lite - Now Available on Shopify App Store - Free

Predictive AI Modeling for Clothing Size Recommendations

Prime AI’s Clothing Size Finder is powered by predictive AI modeling, going far beyond static size charts or simple logic rules.

Using advanced neural networks, our technology is trained on a blend of real-world signals, including:

  • Customer inputs (e.g. height, weight, fit preference)

  • Historical sales and return data

  • Detailed product attributes

  • Size-related customer reviews

This enables the system to predict how a specific item will fit a specific body type, before the shopper makes a decision – rather than just offering a generic recommendation based on averages.

For example, if certain body profiles consistently return a particular product in size M, the system will adjust future recommendations accordingly. This real-time adaptability is key to reducing incorrect sizing and preventing avoidable returns.

As more data flows in through sales, returns, and interactions, the model continuously evolves, refining itself to become even more accurate with every customer touchpoint.

Back to comparison ➔

Why it matters

Predictive AI modeling allows for truly intelligent, data-driven sizing recommendations tailored to each shopper and SKU. By removing guesswork and learning from real-world outcomes, Prime AI helps you lower return rates, boost conversions, and deliver a more confident shopping experience.

It’s not just smart sizing—it’s adaptive, predictive, and proven.

Request a Demo

Still not sure which is right for you?

Request a Demo

Still not sure which is right for you?

Reviews

Anna - Digital Director (UK)
Handy tool and fantastic customer service
The tool allows us to offer accurate fitting information to our customers, including information based on returns to maintain accuracy. The Prime AI team are very helpful if/when issues arise, and are quick at responding and solving problems, as well as suggesting new ways the tool can be implemented.
Denis - Performance Marketing Manager (Romania)
Efficient Cooperation
Our cooperation with Prime AI is very successful, we are happy with the results. Also, optimisation of the tool has been implemented after multiple feedback sessions to which Prime AI has been very open. The UX was not the best, but after multiple feedback sessions, things got fixed.
Rosie - Head of e-commerce and brand (UK)
Great software and amazing account management
Prime AI's account management and monthly reports/ recommendations have been brilliant. We have been able to customise the platform to suit our needs and no ask is ever too much 🙂 ... We have been able to make informed, strategic business decisions and the product is great from a user interface point of view with seamless integration.

Case Studies

multi-brand fashion return reduction case study showing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in online fashion retail.
Multi-brand Fashion Return Reduction – How Prime AI Reduced Returns Across 14 Brands

Multi-brand Fashion Return Reduction – How Prime AI Reduced Returns Across 14 Brands

speedo return reduction case study showing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in online fashion retail.
Speedo Return Reduction: How Prime AI Slashes Returns

Speedo Return Reduction: How Prime AI Slashes Returns

new balance return reduction case study showing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in online fashion retail.
New Balance Return Reduction: How Prime AI Slashes Returns

New Balance Return Reduction: How Prime AI Slashes Returns

puma return reduction case study showing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in online fashion retail.
Puma Return Reduction: How Prime AI Slashes Returns

Puma Return Reduction: How Prime AI Slashes Returns

under armour return reduction case study showing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in online fashion retail.
Under Armour Return Reduction: How Prime AI Slashes Returns

Under Armour Return Reduction: How Prime AI Slashes Returns

the north face return reduction case study showing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in online fashion retail.
The North Face Return Reduction: How Prime AI Slashes Returns

The North Face Return Reduction: How Prime AI Slashes Returns

Nike return reduction case study showing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in online fashion retail.
Nike Return Reduction: How Prime AI Slashes Returns

Nike Return Reduction: How Prime AI Slashes Returns

reebok return reduction case study showing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in online fashion retail.
Reebok Return Reduction: How Prime AI Slashes Returns

Reebok Return Reduction: How Prime AI Slashes Returns

Ellesse return reduction case study showing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in online fashion retail.
Ellesse Return Reduction: How Prime AI Slashes Returns

Ellesse Return Reduction: How Prime AI Slashes Returns

Champion return reduction case study showing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in online fashion retail.
Champion Return Reduction: How Prime AI Slashes Returns​

Champion Return Reduction: How Prime AI Slashes Returns​

Adidas return reduction case study showing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in online fashion retail.
Adidas Return Reduction: How Prime AI Slashes Returns

Adidas Return Reduction: How Prime AI Slashes Returns

Multi-brand retail return reduction case study showing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in online fashion retail.
Multi-brand Retail Return Reduction: How Prime AI Slashes Returns

Multi-brand Retail Return Reduction: How Prime AI Slashes Returns

We analyed 1,000,000 returns. Here's what we found...

Lessons from 1,000,000 Returns" – A bold, high-contrast digital artwork featuring a stylish woman in an off-shoulder dress, overlaid with abstract textures in blue, pink, and black. The vibrant design highlights the key theme of inconsistent sizing in fashion, a major driver of returns in online retail.
Inconsistent Sizing in Fashion: Shocking Insights from Analysing 1 Million Returns

Inconsistent Sizing in Fashion: Shocking Insights from Analysing 1 Million Returns

Bracketing in online shopping – Lessons from 1,000,000 returns. Image of a woman wearing a navy knit two-piece outfit, with a futuristic digital background.
Bracketing in Online Shopping – Lesson 2 from 1M Returns

Bracketing in Online Shopping – Lesson 2 from 1M Returns

A stylish model in a blue-striped outfit with a digital data background, representing insights from analysing 1 million online returns. Text overlay reads ‘Lessons from 1,000,000 Returns – 3’, reinforcing the key theme of how poor fit leads to lost customers.
Poor Fit Leads to Lost Customers – Lesson 3: Stop Return-Driven Churn

Poor Fit Leads to Lost Customers – Lesson 3: Stop Return-Driven Churn

Request a Demo
Menu
Menu

This site uses cookies

By continuing to use our site, you consent to the Privacy Policy terms. If you agree to our terms, ‘Accept Privacy Policy’. See our Privacy policy for more information.

Accept Privacy Policy