Traditionally rings are used at weddings to seal the vows between the bride and the groom. The historical reason lies in the fact that many cultures believe the circle to be a symbol of perfection. So its use in weddings is to hopefully reflect the perfect union of two people so that they can live together happily for the remainder of their life. To add to the romanticism of wedding rings, ancient Egyptians believed the vein in the fourth finger in your left arm to run directly to the heart. The fourth finger obviously being where we usually put the wedding ring. The ring is therefore one of the most important purchases we will make when we marry.
The first thing to do when buying a ring is to find the size of finger of the bride to be. Rings like any item we wear has its own size. The best way to find out the size of your proposed bride is to see if the rings she already wears fits your finger. If that is a no go, you could always take a sneaky measurement of the diameter of the ring. Other ways to find out are to ask a friend or relative or even take her to a jewelery shop to buy her a ring as a present and then make a note of the size of the rings she tries on. If all else fails then it is not difficult to have the jeweler re-size the ring if it does not fit after you purchased it.
Other important considerations when buying a ring are the type of stone for the ring. The most traditional stone is the diamond. The carat is the weight of a diamond with one carat being equal to 200 milligrams. The more carats in a diamond the more expensive it will be due to the fact that larger stones are more rare. Clearer diamonds are more free of blemishes and therefore more pure and hence more expensive. The "clearness" of a diamond has ratings ranging from "FL" for flawless to "I" meaning imperfect. The clearness of a diamond also dictates the color it has and the clearer it is, the more colorless it is and hence more expensive. Again here a rating is used, with "D" for diamonds that are completely colorless to "Z" meaning they are kind of yellow. Finally the cut of the diamond is also a very important consideration. A well cut diamond will be more expensive. This is because the way it is cut allows how much or how little light goes through it and this also adds value to the diamond.
Buying a ring is therefore something for which we should be well prepared for before the wedding, and ideally something that should be done well in advance. Nothing worse than finding a diamond we like a couple of weeks before the wedding and find that is only for display and that it could take a further couple weeks more to get another few in stock. Don't let that happen to you.