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Any jeweller can size your ring or finger in a matter of seconds. Unfortunately, not everyone has a mandrel stick or finger sizing gauge in a drawer somewhere, and sometimes taking a ring out of the house can spoil a surprise. Luckily, finding your ring size is easy to do with simple materials found in your home.
Using your finger: Simply wrap something flexible, (a string, piece of paper, etc.), around your ring finger's large knuckle. Measure the length necessary to go completely around the knuckle, (circumference), and then compare it to the chart below.
Using a ring you already have: With a ruler, measure the distance across (diameter) a ring you currently wear. Measure at the ring's widest point.
When in doubt between two sizes, it is always safer to go to the next larger ring size. This ensures your new ring will fit you. Ideally, use millimeters to get the most accurate result.
| Ring Size | Circumference | Diameter | ||
| 4 | 50 mm | 1 31/32 in. | 16 mm | 5/8 in. |
| 5 | 53 mm | 2 1/8 in. | 17 mm | 21/32 in. |
| 6 | 55 mm | 2 3/16 in. | 17.5 mm | 11/16 in. |
| 7 | 57 mm | 2 1/4 in. | 18 mm | 23/32 in. |
| 8 | 60 mm | 2 3/8 in. | 19 mm | 3/4 in. |
| 9 | 63 mm | 2 1/2 in. | 20 mm | 25/32 in. |
| 10 | 66 mm | 2 5/8 in. | 21 mm | 27/32 in. |
| 11 | 68 mm | 2 11/16 in. | 21.5 mm | 27/32 in. |
| 12 | 71 mm | 2 13/16 in. | 22.5 mm | 29/32 in. |
| 13 | 73 mm | 2 29/32 in. | 23 mm | 29/32 in. |
| 14 | 76 mm | 3 in. | 24 mm | 31/32 in. |