Size Guide

This chart features standard ring sizes by age group and the most common international sizing conversions. The ring sizes are an average estimate and we recommend measuring the finger before selecting your desired size.

How to Measure:

  • Cut a piece of string and wrap it around the finger (not too tight)
  • Then cut or mark the string at the exact measurement
  • Measure the string with a ruler This measurement is the inside diameter of the ring as per the chart below.
Age Range Inside diameter Inside circumference Sizes
  (in) (mm) (in) (mm) USA UK Japan European
1 - 4 Years 0.53 13.46 1.67 42.3 2¼ D½   2.25
3 - 6 Years 0.538 13.67 1.69 42.9 2½ E 3 3
3 - 6 Years 0.546 13.87 1.72 43.6 2¾ E½   3.5
6 - 9 Years 0.554 14.07 1.74 44.2 3 F 4 4.25
6 - 9 Years 0.562 14.27 1.77 44.8 3¼ F½ 5 4.75
6 - 9 Years 0.57 14.48 1.79 45.5 3½ G   5.5
6 - 9 Years 0.578 14.68 1.82 46.1 3¾ G½ 6 6
7 - 10 Years 0.586 14.88 1.84 46.8 4 H 7 6.75
7 - 10 Years 0.594 15.09 1.87 47.4 4¼ H½   7.5
8 - 11 Years 0.602 15.29 1.89 48 4½ I 8 8
4 - 14 Years 0.61 15.49 1.92 48.7 4¾ J   8.75
9+ Years 0.618 15.7 1.94 49.3 5 J½ 9 9.25
9+ Years 0.626 15.9 1.97 50 5¼ K   10
9+ Years 0.634 16.1 1.99 50.6 5½ K½ 10 10.5
9+ Years 0.642 16.31 2.02 51.2 5¾ L   11.25
10+ Years (Teenagers, Young Adults, Adulthood) 0.65 16.51 2.04 51.9 6 L½ 11 11.75
10+ Years (Teenagers, Young Adults, Adulthood) 0.658 16.71 2.07 52.5 6¼ M 12 12.5
10+ Years (Teenagers, Young Adults, Adulthood) 0.666 16.92 2.09 53.1 6½ M½ 13 13.25
10+ Years (Teenagers, Young Adults, Adulthood) 0.674 17.12 2.12 53.8 6¾ N   13.75
11+ Years (Teenagers, Young Adults, Adulthood) 0.682 17.32 2.14 54.4 7 N½ 14 14.5
11+ Years (Teenagers, Young Adults, Adulthood) 0.69 17.53 2.17 55.1 7¼ O   15
11+ Years (Teenagers, Young Adults, Adulthood) 0.698 17.73 2.19 55.7 7½ O½ 15 15.75
11+ Years (Teenagers, Young Adults, Adulthood) 0.706 17.93 2.22 56.3 7¾ P   16.25
11+ Years (Teenagers, Young Adults, Adulthood) 0.714 18.14 2.24 57 8 P½ 16 17
11+ Years (Teenagers, Young Adults, Adulthood) 0.722 18.34 2.27 57.6 8¼ Q   17.5
11+ Years (Teenagers, Young Adults, Adulthood) 0.73 18.54 2.29 58.3 8½ Q½ 17 18.25
11+ Years (Teenagers, Young Adults, Adulthood) 0.738 18.75 2.32 58.9 8¾ R   19
11+ Years (Teenagers, Young Adults, Adulthood) 0.746 18.95 2.34 59.5 9 R½ 18 19.5
11+ Years (Teenagers, Young Adults, Adulthood) 0.754 19.15 2.37 60.2 9¼ S   20.25
11+ Years (Teenagers, Young Adults, Adulthood) 0.762 19.35 2.39 60.8 9½ S½ 19 20.75
11+ Years (Teenagers, Young Adults, Adulthood) 0.77 19.56 2.42 61.4 9¾ T   21.5
11+ Years (Teenagers, Young Adults, Adulthood) 0.778 19.76 2.44 62.1 10 T½ 20 22
11+ Years (Teenagers, Young Adults, Adulthood) 0.786 19.96 2.47 62.7 10¼ U 21 22.75
11+ Years (Teenagers, Young Adults, Adulthood) 0.794 20.17 2.49 63.4 10½ U½ 22 23.25
11+ Years (Teenagers, Young Adults, Adulthood) 0.802 20.37 2.52 64 10¾ V   24
11+ Years (Teenagers, Young Adults, Adulthood) 0.81 20.57 2.54 64.6 11 V½ 23 24.75
11+ Years (Teenagers, Young Adults, Adulthood) 0.818 20.78 2.57 65.3 11¼ W   25.25
11+ Years (Teenagers, Young Adults, Adulthood) 0.826 20.98 2.59 65.9 11½ W½ 24 26
11+ Years (Teenagers, Young Adults, Adulthood) 0.834 21.18 2.62 66.6 11¾ X   26.5
11+ Years (Teenagers, Young Adults, Adulthood) 0.842 21.39 2.65 67.2 12 X½ 25 27.25
11+ Years (Teenagers, Young Adults, Adulthood) 0.85 21.59 2.67 67.8 12¼ Y   27.75
11+ Years (Teenagers, Young Adults, Adulthood) 0.858 21.79 2.7 68.5 12½ Z 26 28.5
11+ Years (Teenagers, Young Adults, Adulthood) 0.866 22 2.72 69.1 12¾ Z½   29
11+ Years (Teenagers, Young Adults, Adulthood) 0.874 22.2 2.75 69.7 13   27 29.75
11+ Years (Teenagers, Young Adults, Adulthood) 0.882 22.4 2.77 70.4 13¼ Z1   30.5
11+ Years (Teenagers, Young Adults, Adulthood) 0.89 22.61 2.8 71 13½     31
11+ Years (Teenagers, Young Adults, Adulthood) 0.898 22.81 2.82 71.7 13¾ Z2   31.75
11+ Years (Teenagers, Young Adults, Adulthood) 0.906 23.01 2.85 72.3 14 Z3   32.25
11+ Years (Teenagers, Young Adults, Adulthood) 0.914 23.22 2.87 72.9 14¼     33
11+ Years (Teenagers, Young Adults, Adulthood) 0.922 23.42 2.9 73.6 14½ Z4   33.5
11+ Years (Teenagers, Young Adults, Adulthood) 0.93 23.62 2.92 74.2 14¾     34.25
11+ Years (Teenagers, Young Adults, Adulthood) 0.938 23.83 2.95 74.8 15     34.75
11+ Years (Teenagers, Young Adults, Adulthood) 0.946 24.03 2.97 75.5 15¼     35.5
11+ Years (Teenagers, Young Adults, Adulthood) 0.954 24.23 3 76.1 15½     36.25
11+ Years (Teenagers, Young Adults, Adulthood) 0.962 24.43 3.02 76.8 15¾     36.75
11+ Years (Teenagers, Young Adults, Adulthood) 0.97 24.64 3.05 77.4 16     37.5