Ring Size Converter 

Ring Size Converter

Use our Ring Size Converter to accurately find your ring size using multiple measurement systems. This free online tool helps you instantly convert between US sizes, UK/AU sizes, inside diameter, and inside circumference, making it easy to choose the correct ring size when shopping online or comparing international sizing standards.

Whether you’re buying a ring as a gift or ordering jewelry from another country, this converter ensures you select the most comfortable and accurate size.

 Features

• Convert US ring sizes (5 – 15)

• UK / Australian half sizes supported

• Inside diameter in inches and millimeters

• Inside circumference in inches and millimeters

• Instant auto-conversion between all units

• Mobile-friendly and easy to use

• No downloads or registration required

 How to Use the Ring Size Converter

Using this ring size calculator is quick and simple:

1. Select any value you already know (US size, UK/AU size, diameter, or circumference).

2. The converter will automatically update all other measurements.

3. Compare results to ensure the most accurate fit.

4. Use the displayed size when purchasing or comparing rings.

You can start with any measurement — the calculator does the rest instantly.

How to Measure Your Ring Size at Home

For best accuracy, follow these steps:

1. Use a strip of paper or string.

2. Wrap it around the base of your finger where the ring will sit.

3. Mark the point where the ends meet.

4. Measure the length using a metric ruler (millimeters).

5. Select the matching inside circumference (mm) in the converter.

6. Your equivalent ring sizes will appear automatically.

👉 Measuring in millimeters provides the most accurate results.

 Important Notes

• Ring sizes may vary slightly between manufacturers.

• Ring width, material, and style can affect the fit.

• Always confirm the sizing system used by the seller.

• If possible, try the ring on before final purchase.

This tool is provided for reference purposes only, and we recommend confirming your size with a professional jeweler when accuracy is critical.