Powered by Google's MediaPipe Hand AI
Measure Your Ring Size at Home
How to measure your ring size at home: use your phone’s camera—your finger or any ring you already own. On-device AI; nothing leaves your device.
NO UPLOAD · NO ACCOUNT · 100% PRIVATE
21
Landmarks tracked
~10s
Avg. measure time
±0.5
US size accuracy
Two Ways to Measure
For Every Occasion
How to measure your ring size
Show your bare finger to the camera—no mandrel or printable chart required. Google MediaPipe tracks 21 hand landmarks and converts them to your ring size in US, EU, UK, and JP formats.
Scan any ring
Slip a ring onto your index finger, point it at the camera, and the AI reads its inner diameter — instantly showing matching sizes from our jewellery catalog.
Buying a gift for your girlfriend? Take her ring, scan it in seconds, and shop with confidence.
The Process
Three Steps to Precision
Allow Camera
Grant camera access. Everything runs locally in your browser — nothing leaves your device.
Show Your Hand
Hold your hand up to the camera with fingers spread. Our AI instantly detects all 21 finger and palm landmarks.
See your ring size
Know what your ring size is in every major standard — US, EU, UK, Japan, Russia, China, India, France, Switzerland, Australia & more — instantly.
The Technology
State-of-the-Art
Vision AI
We use Google's MediaPipe Hand Landmarker — the same model powering sign-language recognition and AR — to detect 21 precise 3D keypoints on your hand at 30+ fps.
Finger width is measured by scanning perpendicular to the detected finger axis using skin-colour segmentation across all Fitzpatrick scale tones. A credit card provides sub-millimetre calibration.
Your Privacy is Sacred
All image processing happens 100% in your browser. Your camera feed never leaves your device. No images are stored, transmitted, or analysed by any server. It's private by architecture, not policy.
Ready?