Wide vs. narrow bands
Perhaps it doesn’t sound obvious, but different band widths may call for different sizes. A narrow band will fit nicely at the point where you measured your finger. However, a wide band might be just right for that point but too tight a few millimeters away.
To ensure you have the right size for a wide band, measure where on your finger the band should start and end. Then, use the described methods to get exact dimensions at the highest and lowest points on your finger. If the measurements differ, go with the larger one.
Temperature and finger size fluctuations
Interestingly enough, your finger size isn’t always the same. We’ve already brought up finger swelling, and that’s because this phenomenon can happen at any time. The temperature has a particularly strong impact here.
You should account for finger size fluctuations when choosing the ring size. Besides taking care of this aspect when measuring, think about whether your fingers tend to swell often. If so, it might be a good idea to get a slightly larger ring.
International ring size conversion
If you’re shopping for rings internationally, you should know that not all countries have the same sizing convention for rings. A particular U.S. ring size might be completely different across both the Atlantic and the Pacific.
Fortunately, there’s a handy conversion chart that you can use to “translate” one ring size to another. Consult this official international chart to convert ring sizes easily.