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Women's Sizing Guide

Women's Ring Size Guide

The complete guide to women's ring sizes — averages, measuring methods, and full conversion charts.

SizeRings.com › Women's Ring Size

Women's ring sizes vary widely, but knowing the averages and how to measure accurately makes shopping for rings — whether for yourself or as a gift — far more straightforward. This guide covers everything you need to know.

Average Women's Ring Size

The average women's ring size in the United States is US size 6:

SystemAverage SizeCommon Range
US / Canada65 – 7.5
UK / IRE / AUSLJ – P
EU / French51.549 – 55
Japan / China129 – 16
Diameter16.5mm15.7 – 17.7mm

Women's Ring Size Chart

US / CanadaUK / IRE / AUSEUJapanDiameter (mm)Circumference (mm)
3F44414.144.2
3.5G45514.545.6
4H46.5714.946.8
4.5I48815.348.0
5J49915.749.3
5.5K50.51116.150.6
6L51.51216.551.9
6.5M531316.953.2
7N541417.354.4
7.5O55.51617.755.7
8P571718.257.2

Sizing for Engagement Rings

Engagement ring sizing is particularly important because these rings are often more intricate, more valuable, and harder to resize than everyday rings. See our dedicated engagement ring size guide for detailed advice. Key considerations:

  • Don't buy a ring you can't resize — avoid full eternity bands if unsure of size
  • Choose a slightly larger size if uncertain — easier and cheaper to resize smaller
  • Consider dominant hand vs. non-dominant — the ring finger on your dominant hand may be slightly larger

How to Find a Woman's Ring Size Secretly

Planning a surprise proposal? The most reliable methods:

  • Borrow a ring she wears on that finger — have it measured by a jeweller or measure the inside diameter yourself
  • Ask her close friends or family — they may know from previous ring shopping
  • Use the average — US size 6 fits most women. Start here if you truly can't find out
  • Use a resizable or adjustable ring for the proposal, then size properly together afterwards
For engagement rings: If you're at all unsure of size, size up by half a size. Most jewellers can resize a ring at least once, and a slightly loose ring is vastly preferable to one that won't go on.

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