UsefulVerse
Language: English

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Ring Measurement and Chart Matcher

Measure a ring’s inner diameter or a finger’s circumference. Convert units, then optionally compare the measurement with a current chart for the exact maker or sizing system.

Your inputs stay on this device. Nothing is uploaded.

Use the tool

Global length comparison · bring a current chart for the exact maker or sizing system if you need a size label.

Optional: paste a current ring size table

Paste 1–100 rows, one per line: size label; measurement. A heading row is optional. Use semicolons or tabs so decimal commas work. Example: Size 6; 16.5. Values must increase from smallest to largest. Use the exact seller’s table and instructions.

Enter a measurement. Add a current chart if you want a size-label match.

The tool reports inner diameter and circumference in millimetres. ISO 8653:2016 describes ring-stick measurement and designation; this page does not reproduce the standard or national size tables. Paste a current chart you are entitled to use for a size-label comparison.

Standard reference: ISO 8653:2016 · ring-size measurement method

The standard’s tables and content are not reproduced here.

Example

An inner diameter of 20 mm corresponds to an inner circumference of about 62.83 mm. If you need a regional or brand size label, compare it with that seller’s current chart.

How it works

The tool reports inner diameter and circumference in millimetres. ISO 8653:2016 describes ring-stick measurement and designation; this page does not reproduce the standard or national size tables. Paste a current chart you are entitled to use for a size-label comparison.

Frequently asked questions

Does the language choose my ring-size system?

No. The page language changes the instructions only. It does not infer your country or choose a size system.

Why do I need to provide a chart for a size label?

Ring-size labels and tolerances differ by country, maker and seller. Use the current chart for the exact ring instead of relying on a generic conversion.

Can I use the printout as a ring gauge?

The card includes a 100 mm scale check, not a ring gauge. Verify its printed length with a physical ruler; use a proper finger gauge or jeweller’s instructions for fit.

Scope and limits

No country, brand, gender or age group is assumed. The chart is supplied by you and compared locally. Measurements do not guarantee fit; ring width, knuckle shape, temperature and design matter. The linked ISO page describes the standard but its content is not reproduced.