Create the perfect length ring blank easily with this handy chart. Download a pdf of Ring Blank Sizing Chart. You can also read a text description of this information below.
To determine your ring blank length, find the desired ring size in the far left column, then read across to the appropriate material thickness. Add 0.5 mm to the length of the blank if the width of your material is greater than 4 mm.
| US Ring Size | 2.6 mm thick | 2.4 mm thick | 2.2 mm thick | 2.1 mm thick | 2.0 mm thick | 1.8 mm thick | 1.6 mm thick | 1.4 mm thick | 1.3 mm thick | 1.2 mm thick | 1.0 mm thick | 0.8 mm thick |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 47.1 mm long | 46.5 mm long | 45.9 mm long | 45.6 mm long | 45.2 mm long | 44.6 mm long | 44.0 mm long | 43.4 mm long | 43.0 mm long | 42.7 mm long | 42.1 mm long | 41.5 mm long |
| 1 1/2 | 48.4 mm long | 47.8 mm long | 47.1 mm long | 46.8 mm long | 46.5 mm long | 45.9 mm long | 45.2 mm long | 44.6 mm long | 44.3 mm long | 44.0 mm long | 43.4 mm long | 42.7 mm long |
| 2 | 49.6 mm long | 49.0 mm long | 48.4 mm long | 48.1 mm long | 47.8 mm long | 47.1 mm long | 46.5 mm long | 45.9 mm long | 45.6 mm long | 45.2 mm long | 44.6 mm long | 44.0 mm long |
| 2 1/2 | 50.9 mm long | 50.3 mm long | 49.6 mm long | 49.3 mm long | 49.0 mm long | 48.4 mm long | 47.8 mm long | 47.1 mm long | 46.8 mm long | 46.5 mm long | 45.9 mm long | 45.2 mm long |
| 3 | 52.2 mm long | 51.5 mm long | 50.9 mm long | 50.6 mm long | 50.3 mm long | 49.6 mm long | 49.0 mm long | 48.4 mm long | 48.1 mm long | 47.8 mm long | 47.1 mm long | 46.5 mm long |
| 3 1/2 | 53.4 mm long | 52.8 mm long | 52.2 mm long | 51.8 mm long | 51.5 mm long | 50.9 mm long | 50.3 mm long | 49.6 mm long | 49.3 mm long | 49.0 mm long | 48.4 mm long | 47.8 mm long |
| 4 | 54.7 mm long | 54.0 mm long | 53.4 mm long | 53.1 mm long | 52.8 mm long | 52.2 mm long | 51.5 mm long | 50.9 mm long | 50.6 mm long | 50.3 mm long | 49.6 mm long | 49.0 mm long |
| 4 1/2 | 55.9 mm long | 55.3 mm long | 54.7 mm long | 54.3 mm long | 54.0 mm long | 53.4 mm long | 52.8 mm long | 52.2 mm long | 51.8 mm long | 51.5 mm long | 50.9 mm long | 50.3 mm long |
| 5 | 57.2 mm long | 56.5 mm long | 55.9 mm long | 55.6 mm long | 55.3 mm long | 54.7 mm long | 54.0 mm long | 53.4 mm long | 53.1 mm long | 52.8 mm long | 52.2 mm long | 51.5 mm long |
| 5 1/2 | 58.4 mm long | 57.8 mm long | 57.2 mm long | 56.9 mm long | 56.5 mm long | 55.9 mm long | 55.3 mm long | 54.7 mm long | 54.3 mm long | 54.0 mm long | 53.4 mm long | 52.8 mm long |
| 6 | 59.7 mm long | 59.1 mm long | 58.4 mm long | 58.1 mm long | 57.8 mm long | 57.2 mm long | 56.5 mm long | 55.9 mm long | 55.6 mm long | 55.3 mm long | 54.7 mm long | 54.0 mm long |
| 6 1/2 | 60.9 mm long | 60.3 mm long | 59.7 mm long | 59.4 mm long | 59.1 mm long | 58.4 mm long | 57.8 mm long | 57.2 mm long | 56.9 mm long | 56.5 mm long | 55.9 mm long | 55.3 mm long |
| 7 | 62.2 mm long | 61.6 mm long | 60.9 mm long | 60.6 mm long | 60.3 mm long | 59.7 mm long | 59.1 mm long | 58.4 mm long | 58.1 mm long | 57.8 mm long | 57.2 mm long | 56.5 mm long |
| 7 1/2 | 63.5 mm long | 62.8 mm long | 62.2 mm long | 61.9 mm long | 61.6 mm long | 60.9 mm long | 60.3 mm long | 59.7 mm long | 59.4 mm long | 59.1 mm long | 58.4 mm long | 57.8 mm long |
| 8 | 64.7 mm long | 64.1 mm long | 63.5 mm long | 63.1 mm long | 62.8 mm long | 62.2 mm long | 61.6 mm long | 60.9 mm long | 60.6 mm long | 60.3 mm long | 59.7 mm long | 59.1 mm long |
| 8 1/2 | 66.0 mm long | 65.3 mm long | 64.7 mm long | 64.4 mm long | 64.1 mm long | 63.5 mm long | 62.8 mm long | 62.2 mm long | 61.9 mm long | 61.6 mm long | 60.9 mm long | 60.3 mm long |
| 9 | 67.2 mm long | 66.6 mm long | 66.0 mm long | 65.7 mm long | 65.3 mm long | 64.7 mm long | 64.1 mm long | 63.5 mm long | 63.1 mm long | 62.8 mm long | 62.2 mm long | 61.6 mm long |
| 9 1/2 | 68.5 mm long | 67.9 mm long | 67.2 mm long | 66.9 mm long | 66.6 mm long | 66.0 mm long | 65.3 mm long | 64.7 mm long | 64.4 mm long | 64.1 mm long | 63.5 mm long | 62.8 mm long |
| 10 | 69.7 mm long | 69.1 mm long | 68.5 mm long | 68.2 mm long | 67.9 mm long | 67.2 mm long | 66.6 mm long | 66.0 mm long | 65.7 mm long | 65.3 mm long | 64.7 mm long | 64.1 mm long |
| 10 1/2 | 71.0 mm long | 70.4 mm long | 69.7 mm long | 69.4 mm long | 69.1 mm long | 68.5 mm long | 67.9 mm long | 67.2 mm long | 66.9 mm long | 66.6 mm long | 66.0 mm long | 65.3 mm long |
| 11 | 72.3 mm long | 71.6 mm long | 71.0 mm long | 70.7 mm long | 70.4 mm long | 69.7 mm long | 69.1 mm long | 68.5 mm long | 68.2 mm long | 67.9 mm long | 67.2 mm long | 66.6 mm long |
| 11 1/2 | 73.5 mm long | 72.9 mm long | 72.3 mm long | 71.9 mm long | 71.6 mm long | 71.0 mm long | 70.4 mm long | 69.7 mm long | 69.4 mm long | 69.1 mm long | 68.5 mm long | 67.9 mm long |
| 12 | 74.8 mm long | 74.1 mm long | 73.5 mm long | 73.2 mm long | 72.9 mm long | 72.3 mm long | 71.6 mm long | 71.0 mm long | 70.7 mm long | 70.4 mm long | 69.7 mm long | 69.1 mm long |
| 12 1/2 | 76.0 mm long | 75.4 mm long | 74.8 mm long | 74.5 mm long | 74.1 mm long | 73.5 mm long | 72.9 mm long | 72.3 mm long | 71.9 mm long | 71.6 mm long | 71.0 mm long | 70.4 mm long |
| 13 | 77.3 mm long | 76.7 mm long | 76.0 mm long | 75.7 mm long | 75.4 mm long | 74.8 mm long | 74.1 mm long | 73.5 mm long | 73.2 mm long | 72.9 mm long | 72.3 mm long | 71.6 mm long |
| 13 1/2 | 79.5 mm long | 78.9 mm long | 78.2 mm long | 77.9 mm long | 77.6 mm long | 77.0 mm long | 76.3 mm long | 75.7 mm long | 75.4 mm long | 75.1 mm long | 74.5 mm long | 73.8 mm long |
| 14 | 80.7 mm long | 80.1 mm long | 79.5 mm long | 79.2 mm long | 78.9 mm long | 78.2 mm long | 77.6 mm long | 77.0 mm long | 76.7 mm long | 76.3 mm long | 75.7 mm long | 75.1 mm long |
