In our lab validation study against reference measurements taken by trained experts, typical accuracy was in the low single-digit millimeters, with no systematic over- or under-measurement. Full validation results are available under NDA.
New from 3DLOOK
AI wrist measurement with millimeter-grade accuracy from two smartphone photos.
3DLOOK computer vision turns two guided photos into a wrist measurement that maps directly to your sizing and fit logic.
Talk to our team
Size: S
143 mm
2
smartphone photos
Low single-
digit mm
typical accuracy in lab validation
API
measurement mapped
to your size chart
The cost of getting wrist fit wrong
Wrist sizing challenges affect purchase, delivery, and onboarding
Size uncertainty creates purchase friction
When shoppers do not know their wrist size, an additional sizing step can become another barrier before checkout.
Home measurement is difficult to standardize
Tape measures, printable wrist sizers, and string-based methods depend on how the customer performs the measurement, so results can vary between attempts.
Every wrong size ships twice
The wrong size can mean returns, resizing, repeat shipping, and additional support workload.
Fit matters for wrist-worn device experience
Proper fit supports comfort and more consistent wear of a wrist-worn device.
How it Works
From two smartphone photos to a precise wrist measurement, in seconds.
1
Capture
The user takes two guided wrist photos, front and side, with a smartphone. No tape measure and no specialized hardware.
2
Measure
3DLOOK's computer-vision engine converts the capture into structured wrist measurement data in under 10 seconds.
3
You match
You map the measurement to your size charts, product dimensions, and fit rules.
4
Recommend
Your customer sees the right size or fit recommendation before checkout, shipment, or onboarding.
5
Integrate
Measurements flow into your e-commerce platform, app, onboarding journey, or internal product systems through the API/SDK integration.
Use cases
Wrist measurement for fit-sensitive products and digital workflows.
Bracelets & cuffs
Fine jewelry & bracelets
The wrong size can mean returns, resizing, repeat shipping, and additional support workload.
Luxury watches
Luxury watches & timepieces
Use wrist measurement for bracelet and strap sizing, online purchase flows, and fit preparation before delivery or a boutique visit.
Consumer & sports wearables
Consumer & sports wearables
Help users find a comfortable and stable fit for wrist-worn devices where daily wear, sensor contact, and long-term engagement depend on how the product sits on the wrist.
Health & connected wellness
Connected health & wellness
Add a standardized wrist-fit step to remote onboarding for health platforms, monitoring programs, and telehealth device deployments, so every device arrives ready to wear.
Accuracy & validation
Accurate against reference measurements. Consistent across repeated scans.
More
consistent
than repeat manual measurements
Low single-
digit mm
typical accuracy vs expert
reference measurements
No systematic
bias
no over- or under-measurement
In our validation study, in a lab setting, 3DLOOK wrist measurements were compared with reference measurements taken by trained research and measurement experts using a tension-controlled measuring tool. Typical accuracy was in the low single-digit millimeters, with no systematic over- or under-measurement. In repeatability testing, repeat 3DLOOK scans were more consistent than repeat manual measurements by the same experts.
Request validation results under NDAEnterprise capabilities
From two photos to fit-ready wrist data, integrated into your digital stack.
Smartphone-based capture
Two guided photos on any smartphone. No tape measure, no printable sizer, no hardware, and no app download.
Computer-vision measurement
Computer vision turns the capture into structured wrist measurement data in millimeters, in under 10 seconds.
A precise input for your
sizing logic
3DLOOK delivers a validated wrist measurement in millimeters. You map it to your size charts and product logic to generate the recommendation.
API / SDK integration
Embed the wrist-measurement flow into your website, app, or onboarding journey through available API/SDK integration options.
Enterprise-ready from
day one
Built to scale from a single pilot to global rollout, with the integration, deployment, and support model enterprise teams expect from a partner with ten years of enterprise deployments.
Privacy and data handling
Images are processed for measurement only. Retention is client-defined: photos can be deleted immediately after processing, or retained for up to 30 days, depending on your policy.
GDPR
In most enterprise deployments, the customer acts as the data controller and 3DLOOK acts as the data processor.
CCPA / CPRA
Where the California Consumer Privacy Act and California Privacy Rights Act apply, 3DLOOK generally acts as a service provider or contractor.
HIPAA
HIPAA compliant, supporting HIPAA-governed deployments where 3DLOOK acts as a business associate under an executed BAA.
Frequently asked questions
General questions
How accurate is 3DLOOK wrist measurement?
Can it replace a printable or online wrist sizer?
Yes. Instead of a printable wrist sizer, a string, or a tape measure, your customer takes two guided smartphone photos, and your site receives a wrist measurement in millimeters.
What does the wrist measurement tool return?
A wrist measurement in millimeters, delivered through an API. You map it to your size chart and fit rules to return a size recommendation.
Which products is it for?
Fine jewelry and bracelets, luxury watches, consumer and sports wearables, and connected health and wellness devices.
Last updated: July 2026
