AI Ring Sizer

Measure Any Finger

Pick a finger and show your open palm. Keep one distance from the camera while measuring—don't move closer or farther. For best accuracy, hold a bank card beside your hand.

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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.