Sizing It is always best to consult a professional jeweler to get properly sized To purchase a nifty plastic ring sizer, click here If you are more of the wing it type, carefully follow these directions below. Cut a thin strip of paper, about 10-12cm long. Wrap the strip of paper tightly around your desired finger. Using a pen or pencil, mark the point where the paper overlaps itself. Lay the strip of paper on a flat surface and use a ruler to measure the distance from the end of the strip to the marking you made, in millimeters. This will give you a measurement of the circumference of your finger. Using the chart below, convert your measurement into a standard US ring size. If you are in between two sizes, it is always best to round up rather than down. Unfortunately we do not resize rings. It is, however, a very inexpensive and painless task for your local jeweler.