| Ring Size (US) | Diameter (Millimeters) |
| 4.0 | 14.9 mm |
| 4.5 | 15.3 |
| 5.0 | 15.7 |
| 5.5 | 16.1 |
| 6.0 | 16.5 |
| 6.5 | 16.9 |
| 7.0 | 17.3 |
| 7.5 | 17.7 |
| 8.0 | 18.1 |
| 8.5 | 18.5 |
| 9.0 | 19.0 |
| 9.5 | 19.4 |
| 10.0 | 19.8 |
| 10.5 | 20.2 |
| 11.0 | 20.6 |
| 11.5 | 21.0 |
| 12.0 | 21.4 |
Frequently Asked Questions
3D Design Tips: How to calculate gold weight by volume?
To calculate the gold weight of a 3D model, you will first need to find the volume of the model. This can be done in Rhino 3D by selecting the closed object and typing in "volume" and then Enter. The software will give you cubic millimeter of the object. With the volume,...
What is a diamond Carat?
A carat (with a C not a K) is the unit of measurement used for the weight of gemstones. The word "carat" is derived from the word "carob", which is the dried fruit bean that was used in the times before digital scales to weigh small objects. A carob bean...
What is your Birthstone?
Find your birthstone below. Click on the month to read more about each stone. January Garnet February Amethyst March Aquamarine Bloodstone April Diamond May Emerald June Pearl Moonstone Alexandrite July Ruby August Peridot Spinel September Sapphire October Opal Tourmaline November Citrine Topaz December Blue Zircon ...
What is the birthstone for October?
The birthstones for October are Opal and Tourmaline. Opals We also often think of opals as only being white, but like pearls, they also come in a variety of beautiful colours. They are a delicate stone, and are best suited for earrings and pendant, however people do wear them...