How to measure ring size in cm?

There’s no worse feeling than receiving a beautiful new ring or waiting for it to arrive with excitement, only to have it delivered one size too big or a few sizes too small.

Measuring your ring size at home can be simple. There are additionally a couple of simple approaches to measure your ring size at home.

  • The most direct way to deal with your ring size is to gauge your finger with a part of thread or paper.
  • Eliminate a part of the paper that is very nearly 3 to 4-inches width and 4 inches’ length.
  • Wrap the paper around your ring finger.
  • Finally, scratch where the paper edges.

What is Centimeter?


A centimeter is a metric unit of measurement used for measuring the length of an object. A centimeter is a metric unit of length. You may also see centimeter spelled as centimeter.

1 centimeter is equal to 0.3937 inches, or 1 inch is equal to 2.54 centimeters. In other words, 1 centimeter is less than half as big as an inch, so you need about two-and-a-half centimeters to make one inch.

Measure Ring Size in cm:


CUT a strip of paper about 8″ long and about 0.5″ wide.
Step 1: WRAP the paper strip around the widest part of the finger your customized ring would sit on. The widest part of your finger may be at the joint. Don’t worry, your ring won’t actually sit here.
Step 2: MARK the point on the paper where the strip forms a complete circle and begins to overlap, with a pen or pencil.
Step 3: MEASURE from the edge of your paper up to the line you just marked with a ruler. Measure up to the nearest millimeter, rounding up if necessary.
Step 4: CONSULT our handy chart to find your ring size, using the length you just calculated.

Another Way:

Take a slice of thread or thin wire.
Utilizing the thread and tie it gently loose around the finger that you want to wear the ring on. Make a mark where it closes. The grip should be smooth and measures with a ruler. Now you will note that sizing is a plus/minus scale. Ensure your hands are warm to get the most correct measurement.

This will help you in the measurement of Centimeter.

Measure Ring Size In cm Conversion table

Ring Size
 Inside Circumference
 Inside Circumference
4.14 cm
4.29 cm
4.41 cm
3.5 1.79″ 4.54 cm
4 1.84 4.7 cm
4.5 1.89 4.8 cm
5 1.94″ 4.9 cm
5.5 1.99″ 5.05 cm
6 2.04″ 5.18 cm
6.5 2.09″ 5.30 cm
7 2.14″ 5.43 cm
7.5 2.19″ 5.56 cm
8 2.24″ 5.68 cm
8.5 2.29″ 5.81 cm
9 2.34″ 5.94 cm
9.5 2.39″ 6.07 cm
10 2.44″ 6.19 cm

Uses to Measuring Ring Size in Centimeters:

Make sure your measurement is in cm and be sure to take the exact measurement. For example, 5.7cm. Do not round the number up or down. This number is your new ring size and needs to be exact.

Rings are typically measured by their inner diameter in millimeters.


  • Some brand’s sizing charts are unique to their product:
    Although we use the standard US ring sizing, some stores will have their own ring size charts. Make sure you double check the sizing chart on their website and if in doubt, always measure to confirm your correct size.
  • Finger size will fluctuate:
    Heat and physical activity can affect the size of your fingers.  When measuring your ring size, make sure you measure at room temperature.
  • In this case, bigger is better:
    If your size sits between two, always go with the larger one. It’s better to have a slither more breathing room than too much compression.