Ring sizes by US size
Choose a size for its measured diameter, circumference, and international equivalents.
US 314.1 mm diameterUS 414.9 mm diameterUS 515.7 mm diameterUS 616.5 mm diameterUS 717.3 mm diameterUS 818.1 mm diameterUS 918.9 mm diameterUS 1019.8 mm diameterUS 1120.6 mm diameterUS 1221.4 mm diameterUS 1322.2 mm diameter
Browse by measured diameter
15 mmdiameter to US size16 mmdiameter to US size17 mmdiameter to US size18 mmdiameter to US size19 mmdiameter to US size20 mmdiameter to US size21 mmdiameter to US size22 mmdiameter to US size
Recommended next step
Need certainty before you order?
A physical sizing set is the best final check; once confirmed, browse the ring type you want.
Confirm with a physical ring sizerReusable sizing sets and mandrels on Amazon
Engagement ringsBrowse styles and settings
Wedding bandsClassic and comfort-fit bands
Ring size adjustersTemporary help for a loose fit
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