Ring Size Chart for Engagement, Wedding, Costume Rings

Ian C. Langtree - Writer/Editor for Disabled World (DW)
Published: 2019/12/19 - Updated: 2024/12/27
Publication Type: Informative
Topic: Medical Calculators and Charts - Publications List

Page Content: Synopsis - Introduction - Main

Synopsis: Sizing measurement chart for engagement, wedding and costume design finger ring sizes. To decrease the ring size a jeweler can make a small cut in the center of the ring and remove excess material until the band is the requested size.

Introduction

Ring Sizing Information

Engagement and wedding rings are always sized on a universal standard scale so that sizes remain constant across jewelry stores in a particular country. These ring sizes are classed in millimeters - which is the measurement based on the inner circumference of the ring.

Main Item

Did You Know...

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Costume, Engagement and Wedding Ring Size Chart

Ring Size Conversions Table
US/CanadaUK/AustraliaJapanChinaDiameter (inch)Diameter (mm)Circumference (inch)Circumference (mm)
0 - - - 0.458 11.63 1.44 36.5
1/4 - - - 0.466 11.84 1.46 37.2
1/2 A - - 0.474 12.04 1.49 37.8
3/4 A 1/2 - - 0.482 12.24 1.51 38.5
1 B 1 1 0.49 12.45 1.54 39.1
1 1/4 B 1/2 - - 0.498 12.65 1.56 39.7
1 1/2 C - - 0.506 12.85 1.59 40.4
1 3/4 C 1/2 - - 0.514 13.06 1.61 41.0
2 D 2 2 0.522 13.26 1.64 41.7
2 1/4 D 1/2 - - 0.53 13.46 1.67 42.3
2 1/2 E 3 3 0.538 13.67 1.69 42.9
2 3/4 E 1/2 - - 0.546 13.87 1.72 43.6
3 F 4 4 0.554 14.07 1.74 44.2
3 1/4 F 1/2 5 5 0.562 14.27 1.77 44.8
3 1/2 G - - 0.57 14.48 1.79 45.5
3 3/4 G 1/2 6 6 0.578 14.68 1.82 46.1
4 H 7 7 0.586 14.88 1.84 46.8
4 1/4 H 1/2 - - 0.594 15.09 1.87 47.4
4 1/2 I 8 8 0.602 15.29 1.89 48.0
4 3/4 J - - 0.61 15.49 1.92 48.7
5 J 1/2 9 9 0.618 15.70 1.94 49.3
5 1/4 K - - 0.626 15.90 1.97 50.0
5 1/2 K 1/2 10 10 0.634 16.10 1.99 50.6
5 3/4 L - - 0.642 16.31 2.02 51.2
6 L 1/2 11 11 0.65 16.51 2.04 51.9
6 1/4 M 12 12 0.658 16.71 2.07 52.5
6 1/2 M 1/2 13 13 0.666 16.92 2.09 53.1
6 3/4 N - - 0.674 17.12 2.12 53.8
7 N 1/2 14 14 0.682 17.32 2.14 54.4
7 1/4 O - - 0.69 17.53 2.17 55.1
7 1/2 O 1/2 15 15 0.698 17.73 2.19 55.7
7 3/4 P - - 0.706 17.93 2.22 56.3
8 P 1/2 16 16 0.714 18.14 2.24 57.0
8 1/4 Q - - 0.722 18.34 2.27 57.6
8 1/2 Q 1/2 17 17 0.73 18.54 2.29 58.3
8 3/4 R - - 0.738 18.75 2.32 58.9
9 R 1/2 18 18 0.746 18.95 2.34 59.5
9 1/4 S - - 0.754 19.15 2.37 60.2
9 1/2 S 1/2 19 19 0.762 19.35 2.39 60.8
9 3/4 T - - 0.77 19.56 2.42 61.4
10 T 1/2 20 20 0.778 19.76 2.44 62.1
10 1/4 U 21 21 0.786 19.96 2.47 62.7
10 1/2 U 1/2 22 22 0.794 20.17 2.49 63.4
10 3/4 V - - 0.802 20.37 2.52 64.0
11 V 1/2 23 23 0.81 20.57 2.54 64.6
11 1/4 W - - 0.818 20.78 2.57 65.3
11 1/2 W 1/2 24 24 0.826 20.98 2.59 65.9
11 3/4 X - - 0.834 21.18 2.62 66.6
12 X 1/2 25 25 0.842 21.39 2.65 67.2
12 1/4 Y - - 0.85 21.59 2.67 67.8
12 1/2 Z 26 26 0.858 21.79 2.70 68.5
12 3/4 Z 1/2 - - 0.866 22.00 2.72 69.1
13 - 27 27 0.874 22.20 2.75 69.7
13 1/4 Z1 - - 0.882 22.40 2.77 70.4
13 1/2 - - - 0.89 22.61 2.80 71.0
13 3/4 Z2 - - 0.898 22.81 2.82 71.7
14 Z3 - - 0.906 23.01 2.85 72.3
14 1/4 - - - 0.914 23.22 2.87 72.9
14 1/2 Z4 - - 0.922 23.42 2.90 73.6
14 3/4 - - - 0.93 23.62 2.92 74.2
15 - - - 0.938 23.83 2.95 74.8
15 1/4 - - - 0.946 24.03 2.97 75.5
15 1/2 - - - 0.954 24.23 3.00 76.1
15 3/4 - - - 0.962 24.43 3.02 76.8
16 - - - 0.97 24.64 3.05 77.4

*This chart is intended to aid people in finding an approximate international equivalent ring size. Disabled World takes no responsibility for any calculation errors.

Printable Ring Size Chart

Continued below image.
Printable chart of international costume, engagement and wedding ring sizes.
Printable chart of international costume, engagement and wedding ring sizes.
Continued...

Author Credentials: Ian is an Australian-born writer, editor, and advocate who currently resides in Montreal, Canada. He is the founder and Editor-in-Chief of Disabled World, a leading resource for news and information on disability issues. With a global perspective shaped by years of travel and lived experience, Ian is a committed proponent of the Social Model of Disability-a transformative framework developed by disabled activists in the 1970s that emphasizes dismantling societal barriers rather than focusing solely on individual impairments. His work reflects a deep commitment to disability rights, accessibility, and social inclusion. To learn more about Ian's background, expertise, and accomplishments, visit his full biography.

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Citing and References

Founded in 2004, Disabled World (DW) is a leading resource on disabilities, assistive technologies, and accessibility, supporting the disability community. Learn more on our About Us page.

Cite This Page: Disabled World. (2019, December 19 - Last revised: 2024, December 27). Ring Size Chart for Engagement, Wedding, Costume Rings. Disabled World (DW). Retrieved May 12, 2025 from www.disabled-world.com/calculators-charts/size-ring.php

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