Amazon Women's and Men's Ring Size Guide

General Size Finger Diameter
(in mm) 		Finger Circumference
(in mm)
5 15.7 49.3
6 16.5 51.9
7 17.3 54.4
8 18.2 57.0
9 18.9 59.5
10 19.8 62.1
11 20.6 64.6
12 21.3 67.2
13 22.2 69.7

Tips for finding your ring size:

  • Measure your finger in warm temperatures at the end of the day.
  • When considering a wide band, move up a size from your measurement, for comfort’s sake.
  • Different countries have different ring-size systems. All sizes listed here are standard American sizes.
  • The average woman’s ring size is about 6. The average man’s ring size is about 10.
  • Your ring size will be about half a size larger on your primary hand (i.e., the hand you write with).