Don’t measure when your body temperature is either too cold or too hot. A cold finger shrinks while a hot finger expands causing an inaccurate reading. Only measure when fingers are at room temperature.
If you hesitate between two sizes of rings, always go with the larger one.
If you consider purchasing a wide band, move up a size from your measurement, for comfort’s sake.
Important: Pay close attention to the listing description to determine whether to choose the next size up or your regular ring size.
When measuring your finger, always refrain from using a string, they tend to stretch, which can result in wrong size. ALWAYS use a paper strip about 1/2 inch width.
If your knuckle is a lot larger than the base of your finger, and you’re using the virtual ruler, measure both the base of your finger and your knuckle and select a size in between the two.
Extra wide band styles tend to run slightly small. If your borrowed ring has a narrower shaft than the one you wish to purchase, you may wish to order a ring a size larger than the normal size worn. Also, large stone rings may cause the shank to lift up when laid on its side on the display, slightly distorting the size measurements.
An established jewelry store has trained their sales person to measure one’s finger. You will most likely get your size correctly over there.