Trying to determine your ring size? Here is a helpful guide on how to measure your finger and what ring size 1.8 cm is in US, UK, and Europe!
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How to Measure Your Ring Size
There are a few different ways that you can measure your ring size at home. The most common way is to measure the inside diameter of a ring that you already wear. You can also use a string or a strip of paper to measure the circumference of your finger and then use a ring size chart to determine your ring size. If you don’t have a ring that fits you or you don’t want to measure your finger, you can also measure the inside diameter of a ring that you already wear.
Use a ring sizer
There are a few ways to measure your ring size at home, but the most accurate way is to use a ring sizer. Ring sizers are small plastic or metal rings that you can use to measure the circumference (distance around) of your finger. Once you know the circumference of your finger, you can find your corresponding ring size on a ring size chart.
If you don’t have a ring sizer, you can use a strip of paper or a string to measure the circumference (distance around) of your finger. Once you have the measurement, find your corresponding ring size on a ring size chart.
Measure your ring with a ruler
To measure your ring size using a ruler, wrap a flexible measuring tape or a strip of paper around the base of your finger. Make sure the tape or paper is snug against your skin, but not too tight. Mark the spot where the end of the tape or paper meets with a pen or pencil, then measure the distance with your ruler. Every millimeter on the ruler is equivalent to one ring size. For example, if your finger measures 1.8 centimeters (cm), then you would need a ring that is size 18.
How to Convert Your Ring Size
Depending on where you live, ring sizes can be measured in centimeters or inches. The United States uses inches, while countries like Canada and the United Kingdom use centimeters.
Convert your ring size to inches
To measure your ring size at home, you will need two things: a flexible measuring tape and a piece of string no wider than a 1/4 inch. If you do not have a flexible measuring tape, you can use a regular rulers. Just be sure to allow for the width of the string when making your measurement.
To find your ring size in inches, simply wrap the measuring tape or string around the base of your finger. Be sure not to pull too tight or leave too much slack. The measurement should be taken at a point on your finger where the ring will sit comfortably—usually near the base. Once you have your measurement, simply consult the chart below to find your corresponding ring size in inches.
Size Bust/Chest Waist Hips
0 0-2 32-34 24-26 34-36
2 4-6 36-38 28-30 36-38
4 8-10 40-42 32-34 38-40
6 12 44 36 40
8 14 46 38 42
10 16 48 40 44
12 18 50 42 46
Convert your ring size to centimeters
cm = circumference in centimeters
To convert ring size to centimeters, multiply your ring size by 2.54. This will give you the circumference of your ring in centimeters.
Here is a chart of common ring sizes in both centimeters and inches:
Size Circumference (cm) Circumference (in)
4 4.3 1.69
4.5 4.6 1.81
5 4.9 1.93
5.5 5.2 2.05
6 5.4 2.13
6.5 5.7 2.24
What Ring Size Is 1.8 cm?
1.8 cm is equal to ring size 7. This is the most common size for women’s rings.
Compare your ring size to a chart
There are a few ways to determine your ring size. The most accurate way is to visit a jeweler and have your finger professionally sized. If you are unable to do this, there are a few DIY methods you cantry at home.
To find your ring size using a strip of paper:
-Cut a thin strip of paper no wider than 1/4 inch (6 mm).
-Wrap the paper around the base of your finger. Make sure the paper is below the joint of your finger and close to your knuckle.
-Mark where the two ends of the paper meet with a pen or pencil, then measure the distance with a ruler in millimeters (mm). This is the circumference of your finger.
– Divide this number by 3.14. This is your ring size in mm. Use the chart below to convert from mm to US ring sizes.
To find your ring size using a string:
-Cut a piece of string or yarn about 6 inches (15 cm) long.
-Wrap the string around the base of your finger, making sure it is below the joint of your finger and close to your knuckle.
-Mark where the string meets and measure this distance with a ruler in millimeters (mm). This iscircumferenceofyourfinger.
-Divide this number by 3.14. This isyourringsizeinmm . UseStringMethodto convert from mm to USring sizes below .
MM Ring Size Inches mm Ring Size Inches
4 3 0.157 32 12 3.2
4 1/2 3 1/2 0.165 33 13 3.3
5 4 0.173 34 14 3,4
5 1/2 4 1/2 0,181 35 15 3,5
6 5 0,189 36 16 3,6
Use an online ring size converter
There are a number of online ring size converters that you can use to determine what ring size 1.8 cm would be. To use one of these converters, simply enter 1.8 cm into the converter and it will give you the equivalent ring size.