DIAMOND BASICS®
Basic Diamonds and Jewelry
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Use our size chart as a reference. All sizes are American.
| General Size | Finger Diameter | Finger Circumference |
| 3 | 14.1 mm | 44.2 mm |
| 3 1/4 | 14.3 mm | 50.0 mm |
| 3 1/2 | 14.5 mm | 45.5 mm |
| 3 3/4 | 14.7 mm | 46.1 mm |
| 4 | 14.9 mm | 46.8 mm |
| 4 1/4 | 15.1 mm | 47.4 mm |
| 4 1/2 | 15.3 mm | 48.0 mm |
| 4 3/4 | 15.5 mm | 48.7 mm |
| 5 | 15,7 mm | 49.3 mm |
| 5 1/4 | 15.9 mm | 50.0 mm |
| 5 1/2 | 16.1 mm | 50.6 mm |
| 5 3/4 | 16.3 mm | 51.2 mm |
| 6 | 16.5 mm | 51.9 mm |
| 6 1/4 | 16.7 mm | 52.5 mm |
| 6 1/2 | 16.9 mm | 53.1 mm |
| 6 3/4 | 17.1 mm | 53.8 mm |
| 7 | 17.3 mm | 54.4 mm |
| 7 1/4 | 17.5 mm | 55.1 mm |
| 7 1/2 | 17.7 mm | 55.7 mm |
| 7 3/4 | 17.9 mm | 56.3 mm |
| 8 | 18.1 mm | 57.0 mm |
| 8 1/4 | 18.3 mm | 57.6 mm |
| 8 1/2 | 18.5 mm | 58.3 mm |
| 8 3/4 | 18.8 mm | 58.9 mm |
| 9 | 19.0 mm | 59.5 mm |
