1. Measuring your finger’s circumference:
1. Prepare a string or a thin strip of paper.
2. Wrap the string around the lowest point in your finger, just before the knuckles. Do not pull the string too tight.
3. Mark where the two ends meet, then use a ruler to measure the part of the string you wrapped around your finger.
4. Follow the same steps to measure your finger joint to make sure the ring will go past it.
5. Use a ring chart to know your ring size.
2. Measuring the diameter of a ring you already have:
1. Bring a ring that fits you well.
2. Put a string (or a ruler) across the center of the ring.
3. Follow the same steps for measuring the finger circumference to know your ring diameter.
It is advisable to take the same measurements at different times because fingers tend to shrink in cold weather, get bigger in hot weather, swell up after eating, or because of water retention. Similarly, the fingers in the dominant hand are usually thicker than those in the other one. Taking all these factors into consideration will ensure that the ring you order is one you’d be able to wear right away.