Ring Size Comparison Chart
Ring Size Comparison Chart compliments of the International Gem Society. A conversion table of Ring sizes. 7 different ring size equivalents available.
| US Standard (Also Canada) | Diameter in Inches | British Equivalent | French Equivalent | German Equivalent | Swiss Equivalent | Japanese Equivalent |
| 0 | .454 | - | - | - | - | - |
| 1/2 | - | A | - | - | - | - |
| 1 | .487 | B | - | - | - | 1 |
| 1 1/2 | .503 | C | - | - | - | - |
| 2 | .520 | D | 41 ½ | 13 ¼ | 1 ½ | 2 |
| 2 1/2 | .536 | E | 42 ¾ | 13 ¾ | 2 ¾ | 3 |
| 3 | .553 | F | 44 | 14 | 4 | 4 |
| 3 3/8 | - | G | 45 ½ | - | 5 ½ | 5 |
| 3 1/2 | .569 | - | - | 14 ½ | - | - |
| 3 3/4 | - | H | 46 ½ | - | 6 ½ | - |
| 4 | .585 | H ½ | - | 15 | - | 7 |
| 4 1/4 | - | I | 47 ¾ | - | 7 ¾ | - |
| 4 7/8 | - | J | 49 | - | 9 | - |
| 5 | .618 | J ½ | - | 15 ¾ | - | 9 |
| 5 1/8 | - | K | 50 | - | 10 | - |
| 5 1/2 | .634 | L | 51 ¾ | 16 | 11 ¾ | - |
| 6 | .650 | M | 52 ¾ | 16 ½ | 12 ¾ | 12 |
| 6 1/2 | .666 | N | 54 | 17 | 14 | 13 |
| 7 | .683 | O | 55 ¼ | 17 ¼ | 15 ¼ | 14 |
| 7 1/4 | .699 | P | 56 ½ | 17 ¾ | 16 ½ | 15 |
| 8 | .716 | Q | 57 ¾ | 18 | 17 ¾ | 16 |
| 8 1/2 | .732 | - | - | 18 ½ | - | 17 |
| 8 5/8 | - | R | 59 | - | 19 | - |
| 9 | .748 | - | - | 19 | - | 18 |
| 9 1/8 | - | S | 60 ¼ | - | 20 ¼ | - |
| 9 1/4 | .764 | - | - | 19 ½ | - | 19 |
| 9 5/8 | - | T | 61 ½ | - | 21 ½ | - |
| 10 | .781 | T ½ | - | 20 | - | 20 |
| 10 1/4 | - | U | 62 ¾ | - | 22 ¾ | 21 |
| 10 1/2 | .797 | U ½ | - | 20 ¼ | - | 22 |
| 10 5/8 | - | V | 63 ¾ | - | 23 ¾ | - |
| 11 | .814 | V ½ | - | 20 ¾ | - | 23 |
| 11 1/8 | - | W | 65 | - | 25 | - |
| 11 1/2 | .830 | - | - | 21 | - | 24 |
| 11 5/8 | - | X | 66 ¼ | - | 26 ¼ | - |
| 12 | .846 | Y | 67 ½ | 21 ¼ | 27 ½ | 25 |
| 12 1/2 | .862 | Z | 68 ¾ | 21 ¾ | 28 ¾ | 26 |
| 13 | .879 | - | - | 22 | - | 27 |
Ring Size Comparison Chart
Compliments of The International Gem Society
International Gem Society
Related Articles
Bead and Necklace Size Charts
Whether you’re a novice bead jewelry maker or just shopping for necklaces, these bead and necklace size charts and links...
Read More
Properties of Diamond Simulants
Diamond simulants, like cubic zirconia and moissanite, often appear in jewelry. See how the properties of real diamonds compare with...
Read More
List of False or Misleading Gemstone Names
A list of False or Misleading Gemstone Names and its Actual Gemological Name. Gathered by the source "Gemstones of the...
Read More
Weights and Measures Conversion Chart
Printable chart to convert weights and measures including Carats, Grams, Kilograms, Ounces, Pounds and Troy Ounces Pounds and Pennyweights.
Read More
Latest Articles
A Guide to Early Victorian Romantic Period Jewelry
The Romantic Period marked the start of the Victorian Era. Learn about the typical qualities of Romantic Period jewelry, including...
Read More
Malaya or Malaia Garnet Value, Price, and Jewelry Information
Malaia or malaya garnets are typically light to dark, slightly pinkish orange, reddish orange, or yellowish orange in color. This...
Read More
Choosing Your First Gemstones: A Rough Guide for Faceters
How should novice faceters choose their first gemstones? Learn which gem rough materials combine cutting ease, low cost, good size,...
Read More
Gemstone Coatings: CVD and More
Gemstone coatings are a simple way to enhance color and luster. Learn about commonly coated gems, different coating techniques, and...
Read More
Never Stop Learning
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
Get Gemology Insights
Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!