ITURA Jewelry Sizing Guide
Rings
Grab a soft tape measure, a piece of string, or a ring you already own. Time to find your perfect fit.
Measure a ring you own
- Pick a ring that already fits the finger you want to wear your ÌTURA ring on.
- Measure the inner diameter with a ruler, in millimeters or inches.
- Match that number to the diameter column in the chart below.
Measure your finger
- Wrap a piece of string or a strip of paper around the base of your finger.
- Mark the point where the ends meet.
- Lay it flat and measure the length in millimeters or inches. That's your circumference.
- Match it to the circumference column below.
Ring Size Guide
Find your fit using the conversions below. All measurements refer to the inner dimensions of the ring.
| Inner Diameter (mm) | Inner Circumference (mm) | US Size | UK Size | EU Size | China Size |
|---|---|---|---|---|---|
| 12.4 | 39.1 | 1 | B | 41 | 1 |
| 12.8 | 40.2 | 1.5 | C | 41.5 | 2 |
| 13.2 | 41.5 | 2 | D | 42 | 3 |
| 13.5 | 42.5 | 2.5 | D½ | 43 | 4 |
| 14.1 | 44.2 | 3 | F | 44 | 5 |
| 14.5 | 45.5 | 3.5 | G | 45 | 6 |
| 14.9 | 46.8 | 4 | H | 46 | 7 |
| 15.3 | 48.0 | 4.5 | I | 47 | 8 |
| 15.7 | 49.3 | 5 | J½ | 49 | 9 |
| 16.1 | 50.6 | 5.5 | K½ | 50 | 10 |
| 16.5 | 51.9 | 6 | L½ | 51 | 11 |
| 16.9 | 53.1 | 6.5 | M½ | 52 | 12 |
| 17.3 | 54.4 | 7 | N½ | 54 | 13 |
| 17.7 | 55.7 | 7.5 | O | 55 | 14 |
| 18.1 | 57.0 | 8 | P | 56 | 15 |
| 18.5 | 58.2 | 8.5 | Q | 57 | 16 |
| 18.9 | 59.5 | 9 | R | 59 | 17 |
| 19.4 | 60.8 | 9.5 | S | 60 | 18 |
| 19.8 | 62.1 | 10 | T | 61 | 19 |
| 20.2 | 63.3 | 10.5 | U | 62 | 20 |
| 20.6 | 64.6 | 11 | V | 63 | 21 |
| 21.0 | 65.9 | 11.5 | W | 65 | 22 |
| 21.4 | 67.2 | 12 | X | 66 | 23 |
| 21.8 | 68.5 | 12.5 | Y | 67 | 24 |
| 22.2 | 69.7 | 13 | Z | 68 | 25 |
| 22.6 | 71.0 | 13.5 | Z+1 | 69 | 26 |
| 23.0 | 72.3 | 14 | Z+2 | 71 | 27 |
| 23.4 | 73.5 | 14.5 | Z+3 | 72 | 28 |
| 23.8 | 74.8 | 15 | Z+4 | 73 | 29 |
How to find your size
Measure a ring you already own. Choose one that fits the intended finger, measure the inner diameter straight across in millimetres, and match it to the chart above.
Measure your finger. Wrap a thin strip of paper or string around the base of your finger, mark where it overlaps, then measure that length in millimetres — this is your inner circumference.
For the truest fit, measure at the end of the day when your fingers are warmest, and size up if you fall between two sizes. Still unsure? Contact us and we’ll be glad to help.
Sizes are approximate. Conversions can shift slightly depending on the manufacturer.
Ring Sizing Tips
Are you in the middle of two sizes? For optimal comfort, choose a larger size.
Keep in mind that your fingers can go half a size smaller in colder climates. In warm conditions, your fingers may also swell.
For the most accurate measurement, take your ring size at the end of the day.
A few things that throw your measurement off
Stuck between two sizes? Go with the larger one.
Your fingers change size throughout the day. Measure in the evening, when they're at their biggest. Measure at room temperature.
Don’t measure right after alcohol or a heavy, salty meal. Both cause swelling, and it'll throw off your number.
Other Sizing Guides
Necklace Size Guide
Bracelet Size Guide