Guide to know how to measure ring size

Measuring the right ring size is basic when we want to buy online. Below we show you all the methods to calculate the size of your ring safely and easily.

There are several methods to know our ring size depending on whether we have a ring of our size to use as a reference or, if not, measure the contour of our finger.

Measuring size with a reference ring

If we already have a ring we can quickly calculate our size by measuring the internal diameter with a simple rule and look for our ring size in a conversion table.

Measure internal diameter

If we already have a ring we can quickly calculate our size by measuring the internal diameter with a simple rule and look for our size in a conversion table.

diameter ring size chart
INNER DIAMETER RING SIZE (US)
15 mm 4
15’3 mm 4’5
15’6 mm 5
16’1 mm 5’5
16’5 mm 6
16’9 mm 6’5
17’4 mm 7
17’7 mm 7’5
18’1 mm 8
18’6 mm 8’5
19’1 mm 9
19’3 mm 9’5
19’7 mm 10
20’1 mm 10’5
20’6 mm 11
21’1 mm 11’5
21’4 mm 12
21’8 mm 12’5
22’3 mm 13
22’7 mm 13’5
23’2 mm 14

If you doubt between two sizes, we recommend you keep the larger one.

Using a printable ring size chart 

If we do not have a ruler we can also compare the ring with the circumferences of the rings by size after printing a chart with the reference silhouettes.

The silhouette that matches the inside of our ring will indicate our ring size. Important to print the PDF document with the exact size (100% scaled).

Remember to print the chart PDF with the exact size (100% scale)

Calculate ring size by measuring our finger

If we want to buy our first ring online we will have to calculate the size by measuring our finger and compare it with the circumference of each ring size

Measuring the contour of our finger

The fastest option is to use a strip of paper or a simple string to measure the diameter. We will only have to measure the distance between the two ends right at the point they touch. Squeeze the strip of paper or string tightly on your finger (it has to be tight, but not too tight) and mark a point to define the ends

Step 1:
Cut out a strip of paper or a piece of string.

Step 2:
Wrap it around your finger like a ring.

Step 3:
We make a mark to indicate the ends of the circumference.

Step 4:
We measure the distance in millimeters and look for our ring size in the table.

CIRCUMFERENCE

SIZE (US)

49 mm

4
50 mm 4’5
51 mm 5
52/53 mm 5’5
54/55 mm 6
56 mm 6’5
57 mm 7
58 mm 7’5
59 mm 8
60/61 mm 8’5
62/63 mm 9
64/65 mm 9’5
66/67 mm 10
68/69 mm 10’5
70/71 mm 11
72/73 mm 11’5
74/75 mm 12
76 mm 12’5

77/78 mm

13
79 mm 13’5
80/81 mm 14

Using a ring finger meter

We can also use a meter. In this case we just have to put our finger inside the meter and hold it like a ring. Neither too tight nor too loose. The indicator will mark the exact size of the ring. 

Option 1: Use our own printable ring sizer strip

Another option is to print and cut out our own ring sizer strip. The operation is the same as with the plastic one: stick the meter to our finger as if it were a ring. We recommend printing it on thick paper.

print ring size chart

It is important to respect the size of the document and print it with a 100% scale to ensure that the measurements indicated are correct.

Option 2: Buy a plastic ring sizer

We can buy plastic ring sizer online. It is practical and very easy to use. The disadvantage is that if we do not have one at hand, we will have to wait a few days to have it.

medidor-para-saber-talla-anillo

Ring’s size chart conversion by countrys

Millimeters and american size are the most international measurements. However, there are different references by country. Below we leave you with a complete ring chart by country.

Diameter
Interior
(mm)
US
Canada
SpainStandard
European
England
Australia
JapanSwitzerlandFranceGermany
14,824744H 1/276 1/246 1/215
15,204,5845I 1/287 3/447 3/415 1/4
15,625947J 1/29104915 3/4
16,035,51048L1011 3/451 3/416
16,4261249M1212 3/452 3/416 1/2
16,646,51350N13145417
17,2371451O1415 1/455 1/417 1/4
17,617,51552P1516 1/256 1/217 3/4
18,0681753Q1617 3/457 ¾18
18,378,51854Q 3/417195918 ½
18,8291955R ¾1820 1/460 1/419
19,339,52056S 3/41921 1/261 1/219 1/2
19,75102257T 1/22022 3/462 3/420
20,1310,52358U 1/22223 3/46320 1/4
20,51112459V 1/223256520 ¾
20,9511,52560W 3/42426 1/466 1/421
21,35122761Y2527 1/267 1/221 ¼
21,7012,52862Z2628 3/468 3/421 3/4
22,06132963Z+127--22
22,4813,5-64Z+1/2----
22,8714-65Z+2----

Ring’s size chart conversion by countrys

Millimeters and american size are the most international measurements. However, there are different references by country. Below we leave you with a complete ring chart by country.

Diameter
Interior
(mm)
US
Canada
SpainStandard
European
England
Australia
JapanSwitzerlandFranceGermany
14,824744H 1/276 1/246 1/215
15,204,5845I 1/287 3/447 3/415 1/4
15,625947J 1/29104915 3/4
16,035,51048L1011 3/451 3/416
16,4261249M1212 3/452 3/416 1/2
16,646,51350N13145417
17,2371451O1415 1/455 1/417 1/4
17,617,51552P1516 1/256 1/217 3/4
18,0681753Q1617 3/457 ¾18
18,378,51854Q 3/417195918 ½
18,8291955R ¾1820 1/460 1/419
19,339,52056S 3/41921 1/261 1/219 1/2
19,75102257T 1/22022 3/462 3/420
20,1310,52358U 1/22223 3/46320 1/4
20,51112459V 1/223256520 ¾
20,9511,52560W 3/42426 1/466 1/421
21,35122761Y2527 1/267 1/221 ¼
21,7012,52862Z2628 3/468 3/421 3/4
22,06132963Z+127--22
22,4813,5-64Z+1/2----
22,8714-65Z+2----

Frequently asked questions after measurin ring size 

I'm doubting between two ring sizes

Whenever you are between two sizes we recommend that you choose the larger size.

Do the ring size methods work the same for men and women?

Yes, we design rings for men, but the methods we propose serve in both cases.

Is it possible that the ring's size I need changes over time?

Once we reach adulthood and stop growing we will always keep the same size. Fingers do not usually get fat or thin except when there is a big change in bodyweight. However, if we lose a lot of weight, we can always take our ring to a jeweler to adapt the size.

Which is the average ring size for men?

Size 10 it’s the most common size for men. Usually size 9.5 for thin men (less than 70 kg. and 180 cm.) and size 11 for large men (more than 90 kg or 190 cm).

Now that you know how to measure your ring size we want to reward you with a discount.
Use the code “KNOWMYSIZE” on any ring in our store for a direct discount.