How to Measure Your Ring Size at Home in 2 Easy Ways

One of the biggest questions when buying a ring online is:

“What ring size do I wear?”

With a simple ruler, you can take a quick measurement at home and compare it with a Ring Size Chart.

Here are two easy methods.

Method 1: Measure Your Finger Width

Place the finger you want to wear the ring on flat against a ruler.

Measure the widest area you need the ring to fit over, such as the base of the finger or the knuckle, and note the measurement in millimetres.

You can then use the sizing chart as a reference when choosing your ring size.

Method 2: Measure an Existing Ring

Already have a ring that fits comfortably?

Place it flat on a ruler and measure the inside diameter across the widest part of the ring.

Remember:

Measure the inside of the ring only—do not include the thickness of the metal band.

Use the inside diameter in millimetres to find the corresponding size on the Ring Size Chart.

Compare Your Measurement With a Ring Size Chart

Ring sizing systems vary between countries and regions.

You may see sizes listed as:

US/CA – United States and Canada
FR – France
HK – Hong Kong

So two different numbers can sometimes represent a similar ring size under different sizing systems.

Ring Size FAQ

What is the easiest method if I already own a ring that fits?
Measure the inside diameter of that ring and compare the measurement with a Ring Size Chart.

Do I measure the inside or outside of a ring?
Measure the inside diameter only, without including the thickness of the band.

Why do US, FR and HK ring sizes use different numbers?
They are different regional sizing systems, so a conversion chart is used to compare them.

Remember: Measure, Compare, Choose

Finding your ring size at home can be simple:

Measure → Check the size chart → Choose your size

If you already have a ring that fits comfortably, measuring its inside diameter with a ruler can be an especially convenient starting point before choosing your next MONI ring.