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

Clothing Size & Fit Finder Technology on Shopify – Free Trial Available

Prime AI’s Clothing Size & Fit Finder Lite is now available on the Shopify App Store and you can try it free for 30 days.

Designed for growing fashion retailers, this version of our powerful size recommendation tool delivers instant sizing support directly on your Product Detail Pages (PDPs), improving shopper confidence, increasing conversion rates, and reducing costly returns.

The free trial supports up to 2 million sessions per month, making it ideal for high-traffic Shopify stores that want to explore the impact of AI-driven fit technology – without any commitment.

Clothing Size & Fit Finder Pro vs. Lite Comparison. Image showing prime ai clothing size and fit finder widget and mobile version, helping customers get the right size first time.

Key benefits during your free trial:

  • Show accurate size recommendations after just one interaction

  • Use AI to reduce return rates and improve CVR

  • Customise the size finder button and widget to match your brand

  • Gain access to fit behaviour insights to understand shopper needs

  • Seamless plug-and-play integration – live in minutes

Why it matters

Shoppers can immediately see what size to buy for each product, with recommendations tailored to their body and the specific item they’re viewing. No repeated interaction with the widget is needed, ensuring a smooth, uninterrupted buying journey.

In short: no friction, faster decisions, and optimised conversion rates.

Still not sure which is right for you?

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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 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

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

YAS Return Reduction: How Prime AI Slashes Returns

ViCOLO return reduction case study showcasing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in men’s fashion e-commerce.
ViCOLO Return Reduction: How Prime AI Slashes Returns

ViCOLO Return Reduction: How Prime AI Slashes Returns

Emme return reduction case study showcasing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in men’s fashion e-commerce.
Emme Return Reduction: How Prime AI Slashes Returns

Emme Return Reduction: How Prime AI Slashes Returns

Noisy May return reduction case study showcasing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in men’s fashion e-commerce.
Noisy May Return Reduction: How Prime AI Slashes Returns

Noisy May Return Reduction: How Prime AI Slashes Returns

Jack & Jones return reduction case study showcasing how Prime AI’s size recommendation tool helped reduce return rates and improve sizing confidence in men’s fashion e-commerce.
Jack & Jones Return Reduction: How Prime AI Slashes Returns

Jack & Jones Return Reduction: How Prime AI Slashes Returns

Joop! return reduction case study highlighting how Prime AI’s size recommendation tool helped lower return rates and improve fit accuracy in fashion e-commerce.
Joop! Return Reduction: How Prime AI Slashes Returns

Joop! Return Reduction: How Prime AI Slashes Returns

Vila return reduction case study demonstrating how Prime AI’s size recommendation tool helped lower return rates and improve fit accuracy in online fashion retail.
Vila Return Reduction: How Prime AI Slashes Returns

Vila Return Reduction: How Prime AI Slashes Returns

SoyaConcept Return Reduction: How Prime AI Slashes Returns

SoyaConcept Return Reduction: How Prime AI Slashes Returns

Someday return reduction case study demonstrating how Prime AI’s size recommendation tool helped reduce return rates and improve fit accuracy in online fashion retail.
Someday Return Reduction: How Prime AI Slashes Returns

Someday Return Reduction: How Prime AI Slashes Returns

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

Opus Return Reduction: How Prime AI Slashes Returns

Penny Black return reduction case study highlighting how Prime AI’s size recommendation tool helped reduce return rates and improve fit accuracy in fashion e-commerce.
Penny Black Return Reduction: How Prime AI Slashes Returns

Penny Black Return Reduction: How Prime AI Slashes Returns

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

Prime AI free shopify size finder app - Clothing Size & Fit Finder with Mobile and Desktop Interface, Size Selection, and Belly Shape Options.
Free Shopify Size Finder App from Prime AI

Free Shopify Size Finder App from Prime AI

Arabic size recommendation widget on Scrubser’s product page, showcasing full right-to-left language support for Middle Eastern fashion and workwear retailers
Arabic Size Recommendation Widget for Fashion & Workwear

Arabic Size Recommendation Widget for Fashion & Workwear

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

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