This is a chart that will be extremely helpful for you to determine the ring size that you need. You can either make use of a tape or a small piece of string to measure the area that will be occupied by the ring. When it becomes a complete circle, make a mark on such string. This will be helpful for you to compare with the chart that is mentioned below.
| Inside Dia. | Inside Circ. | Size | |||
|---|---|---|---|---|---|
| MM | MM |
US CA |
UK AU ZA |
FR DE |
EUR IT ES |
| 14.1 | 44.2 | 3 | F | 44 | 4.25 |
| 14.5 | 45.5 | 3.5 | G | 45.5 | 5.5 |
| 14.9 | 46.8 | 4 | H | 47 | 6.75 |
| 15.3 | 48 | 4.5 | I | 48 | 8 |
| 15.7 | 49.3 | 5 | J-1/2 | 50 | 9.25 |
| 16.1 | 50.6 | 5.5 | K-1/2 | 51 | 10.5 |
| 16.5 | 51.9 | 6 | L-1/2 | 52 | 11.75 |
| 16.9 | 53.1 | 6.5 | M-1/2 | 53 | 13.25 |
| 17.3 | 54.4 | 7 | N-1/2 | 54 | 14.5 |
| 17.7 | 55.7 | 7.5 | O-1/2 | 56 | 15.75 |
| 18.1 | 57 | 8 | P-1/2 | 57 | 17 |
| 18.5 | 58.3 | 8.5 | Q-1/2 | 58 | 18.25 |
| 19 | 59.5 | 9 | R-1/2 | 60 | 19.5 |
| 19.4 | 60.8 | 9.5 | S-1/2 | 61 | 20.75 |
| 19.8 | 62.1 | 10 | T-1/2 | 62 | 22 |
| 20.2 | 63.4 | 10.5 | U-1/2 | 63 | 23.25 |
| 20.6 | 64.6 | 11 | V-1/2 | 64 | 24.75 |
| 21 | 65.9 | 11.5 | W-1/2 | 66 | 26 |
| 21.4 | 67.2 | 12 | X-1/2 | 67 | 27.25 |
| 21.8 | 68.5 | 12.5 | Z | 68 | 28.5 |
| 22.2 | 69.7 | 13 | Z+1 | 70 | 29.75 |
| 22.6 | 71 | 13.5 | Z+1.5 | 71 | 31 |
| 23 | 72.3 | 14 | Z+2 | 72 | 32.25 |
| 23.4 | 73.5 | 14.5 | Z+2.5 | 73.5 | 33.5 |
| 23.8 | 74.8 | 15 | Z+3 | 75 | 34.75 |
Other Tips
1) Measure your finger in warm temperatures at the end of the day.
2) If your knuckle is a lot larger than the base of your finger, measure both the base of your finger and your knuckle and select a size between the two.
3) When considering a wide band, move up a size from your measurement, for comfort’s sake.
