Try one of these three easy methods to make sure your ring fits perfectly, every time.
How to Measure Your Ring Size with String
- Take a length of floss or string and wrap it around the base of your finger.
- Mark where the floss or string first overlaps with a pen.
- Stretch the length of string out along a ruler or measuring tape, and take down the length in millimeters.
- The length you measured is the circumference of your finger—to calculate the diameter, divide the circumference by pi (dividing by 3.14 will work).
- Use the ring size chart below to compare the diameter of your finger to the standard ring sizes.
TIP
String and floss can stretch, so don't pull them too taut. If you do, your measured ring finger size may be larger than your finger and any rings you purchase may be too big.
Measuring Ring Size with a Ring Size Chart
- Find a ring that fits you well.
- Print out a true-to-size ring size chart, and place your ring on the circles until you find the one that matches up with the inside circumference of your ring.
Use a Ring Sizer
The most accurate way to measure ring size is by using a ring-measurement tool. They don't tend to be expensive, and there are many options online.
Ring-sizing tools fall into two categories: a thin measuring tape or a keyring lined with a gradient of ring sizes. The measuring tape type ring sizer can simply be looped around your finger and tightened or loosened with the belt. The keyring type ring sizer has metal loops for each ring size, so just try them on your finger until you find the right fit. Ring sizers can be helpful to keep on hand to measure when you're shopping for rings for other people in your family, too.