AI Ring Sizer

Measure Any Finger

Select a finger, then show your open palm to the camera. Most important: stay at the same distance from the camera—do not move closer or farther while measuring. For best accuracy, hold a bank card in your other hand next to it.

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Fixed distance from camera

Do not move closer or farther during the whole measurement—critical for accuracy

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Good lighting

Avoid backlighting

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Palm & optional card

Palm facing camera, fingers spread · bank card in other hand for scale

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How accuracy works

Without a reference card, the algorithm uses MediaPipe's 21 landmarks and average hand proportions (±1 size). With a credit card visible, precision improves to ±0.5 sizes.

Sizing tips

Fingers swell in warm weather and shrink in cold. Measure at room temperature. If between sizes, choose the larger one.