Bold provides an AI fit and sizing platform for apparel brands.
Bold uses AI body data and digital twin technology to give apparel shoppers accurate size recommendations on product pages. Brands that fit well with this tool are mid-to-large apparel, athletic, and performance-wear brands where fit uncertainty is a real reason shoppers abandon or return. The platform covers sizing charts, virtual fitting, and body measurement analytics across a brand's full catalog.
What Bold does for Shopify brands
- Fit confidence at the size chart -> more shoppers complete the purchase
- Accurate size matches -> fewer fit-related returns to process and restock
- Shoppers who know their size -> larger carts with multiple pieces per order
Overview
Bold Metrics is a San Francisco-based software company that sells an AI body data platform to apparel brands and retailers. It creates a digital twin of each shopper from a few questions and pairs it with garment data to recommend a size. The aim is to reduce fit-related returns and raise conversion and average order value.
For Shopify brands
- Shoppers answer four to six questions, so there is no scanning, photo upload or measuring tape for your customers to handle.
- Size recommendations use your product details, specs and design guidelines, and account for each shopper's fit preference.
- Body data from shoppers feeds insights for your design, size chart, grading, marketing and eCommerce teams.
How it works
A shopper answers four to six questions, and Bold Metrics' AI determines 50+ body measurements and builds a digital twin. The twin is paired with the brand's garment data and the shopper's fit preferences to produce a size recommendation. The site describes a quick integration with onboarding support.
- Built for
- Apparel brands and retailers, including casual, custom and tailored clothing, with category pages for athleisure, dresses, formalwear, kidswear and workwear/uniforms.
Products
- Smart Size Chart™ Helps customers pick their preferred fit the first time, going beyond simple size recommendations.
- Virtual Sizer™ API that recommends the right size for a shopper.
- Apparel Insights® Uses consumer body data to support decisions from design to distribution.
- Virtual Tailor™ Gives custom clothiers and tailors customer body measurements.
- Agentic Sizing Protocol™ Lets AI shopping agents deliver size recommendations.
Buyer notes
- Offers an API-based sizing solution (Virtual Sizer).
- Onboarding support is included, and integration is described as quick.
- Shoppers do not need to provide personally identifiable information.
- Demo requests are available through the website.
From Bold's own site and Shopify App Store listings, as of 2026-10-30.
