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January 7, 2026 Syed Rizvi

Ring Size Calculator (US Standard) ā€“ Find Your Perfect Fit

US Ring Size Calculator

This tool helps you determine your US ring size based on either the inside diameter of a ring you already own or the circumference of your finger. Measurements should be in millimeters (mm).

Your Estimated Ring Size
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Tip: If your measurement falls between two sizes, we recommend choosing the larger size for comfort.

US Ring Size Chart (Quick Reference)

US Size
Diameter (mm)
Circumference (mm)
6
16.5
51.9
7
17.3
54.4
8
18.1
57.0
9
18.9
59.5
10
19.8
62.1
11
20.6
64.6
12
21.4
67.2

Related Sizing Guides

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Disclaimer: This tool provides an estimated result for educational purposes only. Actual prices, sizing, or values may vary by jeweler, region, and market conditions within the United States. We recommend consulting with a professional jeweler for precise sizing.

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