3DLOOK is expanding its computer vision capabilities with AI Wrist Measurement, which measures the wrist precisely from two smartphone photos. Jewelry, watch, wearable, and health device makers can match each wrist measurement to their own size chart.
Why Wrist Measurement Matters
Wrist fit can influence comfort, product performance, purchase confidence, and the overall experience of wearing an item.
Remote purchase and onboarding journeys often depend on sizing kits, measuring tapes, printable guides, or estimates. Results can vary based on tool availability, measurement placement, and how closely the person follows the instructions.
3DLOOK AI Wrist Measurement adds guided smartphone capture and a structured measurement output that can be used within existing size, fit, and product-selection logic.
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How 3DLOOK AI Wrist Measurement Works
The experience runs in a standard web browser. It needs two smartphone photos, a standard card for scale, and no app download or measurement hardware.
The process includes four stages:
- Guided capture: A user takes two wrist photos by following on-screen instructions.
- Computer-vision measurement: 3DLOOK’s computer-vision technology processes the photos and calculates the wrist measurement.
- Size or fit mapping: The company applies the measurement to its product specifications, size ranges, or fit rules.
- Workflow integration: The result feeds directly into the company’s purchase, product configuration, or onboarding.
“Technology is moving onto the body, and the closer it sits, the more a few millimeters matter. Wrist measurement shows that 3DLOOK can take years of full-body measurements down to a single body part, using nothing more than two smartphone photos. We want every company building for the body to know it fits before it ships.” ― Katerina Galich, CEO of 3DLOOK.
Accuracy Against Reference Measurements
In a lab validation study, 3DLOOK compared its smartphone wrist measurements with reference measurements taken by trained measurement experts using a tension-controlled measuring tool. 3DLOOK AI Wrist Measurement achieved typical accuracy in the low single-digit millimeters, with no systematic over- or under-measurement.
Detailed validation results are available to companies under NDA.

Applications Across Wrist-Worn Product Categories
3DLOOK AI Wrist Measurement helps companies fit products across several categories:
- Fine jewelry and bracelets: Bring the care of an in-boutique fitting to the client at home, with a piece that fits the first time it’s worn.
- Luxury watches and timepieces: Guide case size, strap, and bracelet link choices before the order ships.
- Consumer and sports wearables: Inform device and band selection during a digital purchase journey.
- Connected health and wellness products: Fit wrist-worn devices remotely where fit affects comfort, adherence, or clinical performance.
“Getting the size right used to mean asking customers to measure themselves at home, visit a store, or wait for a sizing kit in the mail, and too often it meant a return when the product didn’t fit. Now brands can capture a real measurement at the moment a customer decides to buy, right from their phone. Once a brand knows each customer’s exact wrist size, it can build every recommendation around that person. That’s how selling anything that has to fit should work.” ― Whitney Cathcart, Co-founder and Chief Commercial Officer of 3DLOOK
Integration With Existing Digital Workflows
Companies can embed the capture experience within a website, app, or onboarding journey using application programming interfaces (APIs) and software development kits (SDKs).
The integration supports e-commerce, product configuration, and device onboarding. Delivery method and workflow design can be tailored to each company’s technology environment and intended use.
Privacy and Data Handling
3DLOOK AI Wrist Measurement is designed for enterprise implementation. Available data-handling configurations can support organizations operating under the General Data Protection Regulation (GDPR), the California Consumer Privacy Act (CCPA), the California Privacy Rights Act (CPRA), and the Health Insurance Portability and Accountability Act (HIPAA).
The applicable data roles, processing terms, retention settings, and organizational responsibilities depend on the implementation.
Availability
3DLOOK AI Wrist Measurement is already available.
Companies interested in evaluating the technology or exploring an integration can request a demo from the 3DLOOK team.
Learn More About 3DLOOK AI Wrist Measurement
Interested in adding smartphone-based wrist measurement to a product-selection or onboarding experience?
Explore 3DLOOK AI Wrist Measurement