Ring Blank Sizing Chart
| Ring Blank Sizing Cart | |||||||||||||||
| 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 .05 mm to the length of the blank if the width of your material is greater than 4 mm. | |||||||||||||||
| Material Thickness | |||||||||||||||
| US | Metric | Diameter | Circum. | 10 gauge | 12 gauge | 14 gauge | 16 gauge | 18 gauge | 20 gauge | ||||||
| Ring Size | Ring Size | (mm) | (mm) | 2.6 mm | 2.4 mm | 2.2 mm | 2.1 mm | 2.0 mm | 1.8 mm | 1.6 mm | 1.4 mm | 1.3 mm | 1.2 mm | 1.0 mm | 0.8 mm |
| 1 | 39 | 12.4 | 39 | 47.1 | 46.5 | 45.9 | 45.6 | 45.2 | 44.6 | 44 | 43.4 | 43 | 42.7 | 42.1 | 41.5 |
| 1.5 | 40.2 | 12.8 | 40.2 | 48.4 | 47.8 | 47.1 | 46.8 | 46.5 | 45.9 | 45.2 | 44.6 | 44.3 | 44 | 43.4 | 42.7 |
| 2 | 41.5 | 13.2 | 41.5 | 49.6 | 49 | 48.4 | 48.1 | 47.8 | 47.1 | 46.5 | 45.9 | 45.6 | 45.2 | 44.6 | 44 |
| 2.5 | 42.7 | 13.6 | 42.7 | 50.9 | 50.3 | 49.6 | 49.3 | 49 | 48.4 | 47.8 | 47.1 | 46.8 | 46.5 | 45.9 | 45.2 |
| 3 | 44 | 14 | 44 | 52.2 | 51.5 | 50.9 | 50.6 | 50.3 | 49.6 | 49 | 48.4 | 48.1 | 47.8 | 47.1 | 46.5 |
| 3.5 | 45.2 | 14.4 | 45.2 | 53.4 | 52.8 | 52.2 | 51.8 | 51.5 | 50.9 | 50.3 | 49.6 | 49.3 | 49 | 48.4 | 47.8 |
| 4 | 46.5 | 14.8 | 46.5 | 54.7 | 54 | 53.4 | 53.1 | 52.8 | 52.2 | 51.5 | 50.9 | 50.6 | 50.3 | 49.6 | 49 |
| 4.5 | 47.8 | 15.2 | 47.8 | 55.9 | 55.3 | 54.7 | 54.3 | 54 | 53.4 | 52.8 | 52.2 | 51.8 | 51.5 | 50.9 | 50.3 |
| 5 | 49 | 15.6 | 49 | 57.2 | 56.5 | 55.9 | 55.6 | 55.3 | 54.7 | 54 | 53.4 | 53.1 | 52.8 | 52.2 | 51.5 |
| 5.5 | 50.3 | 16 | 50.3 | 58.4 | 57.8 | 57.2 | 56.9 | 56.5 | 55.9 | 55.3 | 54.7 | 54.3 | 54 | 53.4 | 52.8 |
| 6 | 51.5 | 16.4 | 51.5 | 59.7 | 59.1 | 58.4 | 58.1 | 57.8 | 57.2 | 56.5 | 55.9 | 55.6 | 55.3 | 54.7 | 54 |
| 6.5 | 52.8 | 16.8 | 52.8 | 60.9 | 60.3 | 59.7 | 59.4 | 59.1 | 58.4 | 57.8 | 57.2 | 56.9 | 56.5 | 55.9 | 55.3 |
| 7 | 54 | 17.2 | 54 | 62.2 | 61.6 | 60.9 | 60.6 | 60.3 | 59.7 | 59.1 | 58.4 | 58.1 | 57.8 | 57.2 | 56.5 |
| 7.5 | 55.3 | 17.6 | 55.3 | 63.5 | 62.8 | 62.2 | 61.9 | 61.6 | 60.9 | 60.3 | 59.7 | 59.4 | 59.1 | 58.4 | 57.8 |
| 8 | 56.6 | 18 | 56.5 | 64.7 | 64.1 | 63.5 | 63.1 | 62.8 | 62.2 | 61.6 | 60.9 | 60.6 | 60.3 | 59.7 | 59.1 |
| 8.5 | 57.8 | 18.4 | 57.8 | 66 | 65.3 | 64.7 | 64.4 | 64.1 | 63.5 | 62.8 | 62.2 | 61.9 | 61.6 | 60.9 | 60.3 |
| 9 | 59.1 | 18.8 | 59.1 | 67.2 | 66.6 | 66 | 65.7 | 65.3 | 64.7 | 64.1 | 63.5 | 63.1 | 62.8 | 62.2 | 61.6 |
| 9.5 | 60.3 | 19.2 | 60.3 | 68.5 | 67.9 | 67.2 | 66.9 | 66.6 | 66 | 65.3 | 64.7 | 64.4 | 64.1 | 63.5 | 62.8 |
| 10 | 61.6 | 19.6 | 61.6 | 69.7 | 69.1 | 68.5 | 68.2 | 67.9 | 67.2 | 66.6 | 66 | 65.7 | 65.3 | 64.7 | 64.1 |
| 10.5 | 62.8 | 20 | 62.8 | 71 | 70.4 | 69.7 | 69.4 | 69.1 | 68.5 | 67.9 | 67.2 | 66.9 | 66.6 | 66 | 65.3 |
| 11 | 64.1 | 20.4 | 64.1 | 72.3 | 71.6 | 71 | 70.7 | 70.4 | 69.7 | 69.1 | 68.5 | 68.2 | 67.9 | 67.2 | 66.6 |
| 11.5 | 65.3 | 20.8 | 65.3 | 73.5 | 72.9 | 72.3 | 71.9 | 71.6 | 71 | 70.4 | 69.7 | 69.4 | 69.1 | 68.5 | 67.9 |
| 12 | 66.6 | 21.2 | 66.6 | 74.8 | 74.1 | 73.5 | 73.2 | 72.9 | 72.3 | 71.6 | 71 | 70.7 | 70.4 | 69.7 | 69.1 |
| 12.5 | 67.9 | 21.6 | 67.9 | 76 | 75.4 | 74.8 | 74.5 | 74.1 | 73.5 | 72.9 | 72.3 | 71.9 | 71.6 | 71 | 70.4 |
| 13 | 69.1 | 22 | 69.1 | 77.3 | 76.7 | 76 | 75.7 | 75.4 | 74.8 | 74.1 | 73.5 | 73.2 | 72.9 | 72.3 | 71.6 |
| 13.5 | 71.3 | 22.7 | 71.3 | 79.5 | 78.9 | 78.2 | 77.9 | 77.6 | 77 | 76.3 | 75.7 | 75.4 | 75.1 | 74.5 | 73.8 |
| 14 | 72.6 | 23.1 | 72.6 | 80.7 | 80.1 | 79.5 | 79.2 | 78.9 | 78.2 | 77.6 | 77 | 76.7 | 76.3 | 75.7 | 75.1 |
