Here you can select the type of ring that your gem should be attached to.
It is pure silver and their price is based on their weight. If your finer is slim it obvuisly needs tighter ring and less silver cost.
To have an accurate size for your ring, either visit the nearest ring shop in your local area and ask them to measure your ring size and let us know the number you are told or you can simply check the below chart and get your right size and then mention that in the checkout page,
You can select whether your ring is light or heavy and if you want men style or women styles.