Find Your Perfect Fit
A ring should fit comfortably—snug enough so that it won't fall off, but loose enough to slide over your knuckle. Use our comprehensive guide below to ensure you select the correct size.
How to Measure
Two Simple Methods
Method 1: Measure an Existing Ring
This is often the most accurate way to determine your size if you already own a ring that fits the intended finger perfectly.
Select a ring that is not bent or out of shape. Place the ring on a flat surface and use a ruler with millimeter measurements to measure the internal diameter.
It is crucial that you measure the inside edge to inside edge, ignoring the metal casing of the ring itself. If your measurement falls between two sizes, we always recommend choosing the larger size for a more comfortable fit.
Best for: Surprise Gifts & Standard Bands
Method 2: The Paper Technique
If you don't have a ring to reference, you can measure your finger directly using a simple strip of paper or a non-stretchy string.
Cut a strip of paper about 10cm long. Wrap it around the base of the finger you wish to measure. Make sure it is snug but comfortable—not too tight that it cuts off circulation, and not too loose.
Mark the point where the end of the paper overlaps with a pen. Unroll the paper and place it against a ruler to measure the length in millimeters. This measurement gives you the circumference of your finger, which corresponds to the size chart below.
Best for: First-time buyers
Tips for Accuracy
Check the Temperature
Fingers shrink when cold and expand when warm. Measure your fingers at the end of the day when they are warmest for the most accurate fit.
Consider the Band Width
Thicker bands (over 3mm) tend to fit tighter than thin bands. If you are purchasing a chunky statement ring, consider sizing up by a half size.
Measure the Knuckle
If your knuckle is significantly larger than the base of your finger, measure both and choose a size in between to ensuring the ring slides over.
Zamari Size Chart
| US / CA | UK / AUS | Diameter (mm) | Circumference |
|---|---|---|---|
| 3 | F | 14.0 | 44.0 |
| 3 ½ | G | 14.4 | 45.2 |
| 4 | H | 14.8 | 46.5 |
| 4 ½ | I | 15.2 | 47.7 |
| 5 | J ½ | 15.6 | 49.0 |
| 5 ½ | L | 16.0 | 50.3 |
| 6 | M | 16.5 | 51.8 |
| 6 ½ | N | 16.9 | 53.1 |
| 7 | O | 17.3 | 54.3 |
| 7 ½ | P | 17.7 | 55.6 |
| 8 | Q | 18.2 | 57.2 |
| 8 ½ | R | 18.6 | 58.4 |
| 9 | S | 19.0 | 59.7 |
| 9 ½ | T | 19.4 | 61.0 |
| 10 | U | 19.8 | 62.2 |
| 10 ½ | U ½ | 20.2 | 63.5 |
| 11 | V ½ | 20.6 | 64.7 |
| 11 ½ | X | 21.0 | 66.0 |
| 12 | Y | 21.4 | 67.2 |
Common Questions
Method 1 (Diameter): Use an existing ring that fits you well. Measure the inside diameter with a ruler in millimeters (mm) and compare it with the Diameter column in our Chart.
Method 2 (Circumference): Wrap a thin piece of paper or string around your finger, mark the overlap, and measure the resulting length in mm.
If you don't have a ring to measure, use Method 2 described above: find your ring size by measuring the circumference of your finger using a piece of paper or string. You can also visit a jeweler, who can help you determine your ring size with professional tools.
Yes, you can use a string or a piece of paper (Method 2) to measure your finger. Just wrap it around your finger where the ring will sit, mark the point where the string overlaps, and measure the length in millimeters to find your ring size using the Circumference column in the chart.
If your measurement falls between two sizes, it's usually best to choose the larger size to ensure comfort, especially if the ring has a wider band.
Yes, your fingers can swell slightly throughout the day due to various factors like temperature and activity level. It's best to measure your finger size at the end of the day when your fingers are likely at their largest.