Ring Size Guide
| Inside Diameter | Inside Circumference | Sizes | |
| mm | mm | USA & Canada | British & Australian |
| 14.86 | 46.68 | 4 | H 1/2 |
| 15.01 | 47.25 | 4 1/4 | I |
| 15.27 | 47.97 | 4 1/2 | I 1/2 |
| 15.53 | 48.79 | 4 3/4 | J 1/4 |
| 15.70 | 49.32 | 5 | J 1/2 |
| 15.90 | 49.95 | 5 1/4 | K 1/4 |
| 16.1 | 50.58 | 5 1/2 | L |
| 16.30 | 51.21 | 5 3/4 | L 1/4 |
| 16.51 | 51.87 | 6 | M |
| 16.71 | 52.50 | 6 1/4 | M 1/2 |
| 16.92 | 53.16 | 6 1/2 | N |
| 17.13 | 53.82 | 6 3/4 | N 1/2 |
| 17.35 | 54.51 | 7 | O |
| 17.45 | 54.82 | 7 1/4 | O 1/2 |
| 17.75 | 55.76 | 7 1/2 | P |
| 17.97 | 56.45 | 7 3/4 | P 1/2 |
| 18.19 | 57.15 | 8 | Q |
| 18.35 | 57.65 | 8 1/4 | Q 1/2 |
| 18.53 | 58.21 | 8 1/2 | Q 3/4 |
| 18.69 | 58.72 | 8 3/4 | R 1/4 |
| 18.89 | 59.34 | 9 | R 3/4 |
| 19.22 | 60.38 | 9 1/4 | S 1/4 |
| 19.41 | 60.98 | 9 1/2 | S 3/4 |
| 19.62 | 61.64 | 9 3/4 | T 1/4 |
| 19.84 | 62.33 | 10 | T 1/2 |
| 20.02 | 62.89 | 10 1/4 | U |
| 20.20 | 63.46 | 10 1/2 | U 1/2 |
| 20.44 | 64.21 | 10 3/4 | V 1/4 |
| 20.68 | 64.97 | 11 | V 1/2 |
| 20.85 | 65.50 | 11 1/4 | W 1/4 |
| 21.08 | 66.22 | 11 1/2 | W 3/4 |
| 21.24 | 66.73 | 11 3/4 | X 1/4 |
| 21.49 | 67.51 | 12 | Y |
| 21.69 | 68.14 | 12 1/4 | Y 1/2 |
| 21.89 | 68.77 | 12 1/2 | Z |
| 22.10 | 69.43 | 12 3/4 | Z +1/2 |
| 22.33 | 70.15 | 13 | Z+1 |
| 22.54 | 70.81 | 13 1/4 | Z+1 1/2 |
| 22.60 | 71.00 | 13 1/2 | Z+2 |
| 22.92 | 72.01 | 13 3/4 | Z+2 1/2 |
| 23.16 | 72.76 | 14 | Z+3 |
| 23.37 | 73.42 | 14 1/4 | Z+3 1/2 |
| 23.55 | 73.98 | 14 1/2 | Z+4 |
| 23.78 | 74.71 | 14 3/4 | Z+4 1/2 |
| 24 | 75.4 | 15 | Z+5 |
| 24.19 | 76 | 15 1/4 | Z+5 1/2 |
| 24.41 | 76.69 | 15 1/2 | Z+6 |
| 24.61 | 77.31 | 15 3/4 | Z+6 1/2 |
| 24.83 | 78 | 16 | Z+7 |
The Hands-On Way
Found the ring? Here’s a quick way to check your perfect fit:

-
Prepare a small tool.
Take a measuring tape, a piece of string, or a narrow strip of paper. -
Measure your finger.
Wrap it gently around the finger you’ll wear the ring on. -
Get your measurement.
Lay the string or paper flat and measure the distance to your mark with a ruler. Compare that number to the size chart above (or below) to find the nearest match.

Measure an Existing Ring
A simple method if you’re preparing a surprise or just checking your size at home:

-
Pick the right ring.
Choose one that fits comfortably on the finger you plan to wear your new ring on. -
Measure the inner diameter.
Place the ring on a flat surface and measure its inside diameter in millimeters (mm). -
Compare with the chart.
Match your measurement to the closest ring size using the guide above (or below).



