WHERE SIZE MATTERS
A person’s ring size may change over time owing to age, injury or weight change. A jeweller may be able to resize your ring, although this depends on its design.
Measure your finger size at the end of the day when your fingers are at their largest (like sizing shoes).
Don’t measure finger sizes when your hands are cold; let them warm up to room temperature. If your finger falls between two sizes, choose the larger size to make sure it will fit; a wider ring may require a slightly larger size, because it covers more of your finger.
Wrap a piece of string or a strip of paper around your finger. Mark the point where the two ends meet. Measure the string or paper against a ruler to get the circumference of your finger. Divide that by 3.14 to get the diameter of your finger. Look up your ring size using the table shown on the right.