Made in Montreal

How do I choose the right ring size?

Choosing a ring size is certainly not a thesis topic, but believe it or not, it is one of the most annoying questions a jeweller can ask someone. If you are there and the ring is for you, the question does not arise. The jeweller takes out his ring to measure your finger size or he simply makes you try on a ring. It gets complicated if you have to choose a ring secretly for someone else. The method is simple to find out your own ring size, but it is impossible to do it with the naked eye for another person. Let's start at the beginning.

professional metal ringer

Pi, circumference and inner diameter 📏

Do you remember the famous mathematical formula with the symbol pi ? 3.141... Do you remember it? The formula says that when the circumference of an object is divided by pi, we get its diameter. For example, if you measure your finger circumference and it is 50 mm, its diameter is 15.9 mm. In Europe, these figures are enough to know the size of your finger. In French jewellers, the circumference is used, while in Germany, the inside diameter determines the size of your finger. In Canada as in the United States, the Size of a ring is calculated on a scale from 1 to 15 with half points. The rest is not necessarily logical and a correspondence table is necessary to find the right size. We have recreated this correspondence table a little further down.

How to choose the right ring size 💍

Several sites offer you to print the virtual ring er with the ringer circles or the paper ringer ribbon. We strongly advise you not to do so. They are not always reliable and printing the file can alter their accuracy.

Here are three methods that we believe to be the most effective.

 Measuring the inside diameter of a ring

  • Take a ring that fits your finger turn or the person you are giving a ring to.
  • Measure the inside diameter of the ring with a ruler at the widest point of the ring. Be sure to hold the ruler straight.
  • Use the correspondence table to find the desired size.


Illustration of a ring with a ruler showing the inside diameter of a ring

Measuring the circumference of the finger

  • Take a piece of string or a strip of paper and wrap it around the widest part of your finger. Usually this is the second phalanx. 
  • Adjust without jamming too much. It is better that the ring is bigger than smaller. It will be easier to modify it if necessary. 
  • Mark the location of the crossing with a pencil. Unfold and measure this distance using a ruler. Note the circumference of your finger.  
  • Repeat this exercise two or three times to make sure the measurement is correct. 
  • Use the correspondence table to find the desired size. 

Illustration of two fingers with arrows indicating the second phalanx, where the circumference of a finger should be measured.

Important note : It is advisable to measure your finger circumference at the end of the day or at a time when your finger is most swollen due to heat and activity. Also, this way of measuring requires some dexterity and is easier to do with two people.

The adjustable plastic ring

  • Surround your second phalanx with the adjustable plastic ring and tighten it without getting it too tight.
  • Once set, simply read the indicated measurement. No conversion to be made.
  • The adjustable plastic ringer is the safest method after the jeweller's ringer.
  • Order a free ringer by clicking here.

Finger ring holders with adjustable plastic rings thereon
Semi-eternity ring in yellow gold with a large diamond in the center
Rose gold halo type engagement ring
Engagement ring in white gold with a big diamond design as a sign of eternity
  • Correspondence Table - Canada and U.S. Sizes

Circumference

Diameter

Size

46.5 mm

14.8 mm

4

48 mm

15.2 mm

4.5

49 mm

15.8 mm

5

50.5 mm

16.1 mm

5.5

51.5 mm

16.4 mm

6

53 mm

16.9 mm

6.5

54.5 mm

17.4 mm

7

55.5 mm

17.7 mm

7.5

57 mm

18.1 mm

8

58 mm

18.5 mm

8.5

59.5 mm

18.9 mm

9

61 mm

19.4 mm

9.5

62 mm

19.7 mm

10

63.5 mm

20.2 mm

10.5

64.5 mm

20.5 mm

11

66 mm

21.0 mm

11.5

67.5 mm

21.5 mm

12

68.5 mm

21.8 mm

12.5

70 mm

22.3 mm

13

71 mm

22.6 mm

13.5

72 mm

22.9 mm

14

73.5 mm

23.4 mm

14.5

74.5 mm

23.7 mm

15

  • Correspondence Table - Canada and U.S. Sizes

Circumference

Diameter

Size

46.5 mm

14.8 mm

4

48 mm

15.2 mm

4.5 

49 mm

15.6 mm

5

50.5 mm

16.1 mm

5.5

51.5 mm

16.4 mm

6

53 mm

16.9 mm

6.5

54.5 mm

17.4 mm

7

55.5 mm

17.7 mm

7.5

57 mm

18.1 mm

8

58 mm

18.5 mm

8.5

59.5 mm

18.9 mm

9

61 mm

19.4 mm

9.5

62 mm

19.7 mm

10

63.5 mm

20.2 mm

10.5

64.5 mm

20.5 mm

11

66 mm

21.0 mm

11.5

67.5 mm

21.5 mm

12

68.5 mm

21.8 mm

12.5

70 mm

22.3 mm

13

71 mm

22.6 mm

13.5

72 mm

22.9 mm

14

73.5 mm

23.4 mm

14.5

74.5 mm

23.7 mm

15

The importance of choosing the right ring size 🌟

It is important to choose the right ring size so that you and her are one. Don't be afraid to do things for fear of losing it, and on the other hand, a ring that is too tight is very uncomfortable. If your finger size falls between two measurements, take the larger one. When you secretly choose a ring for your loved one, it is advisable to know their ring size and again, choose larger to smaller. Ask your loved one's family or friends. The more patterns and stones a ring has, the harder it will be for a jeweller to put a ring on Size without anything appearing. For more answers to your questions, do not hesitate to contact our jewellers by phone, email or through our chat service on the Flamme en rosewebsite.

Semi-eternity ring in yellow gold with a large diamond in the center
Rose gold halo type engagement ring
Engagement ring in white gold with a big diamond design as a sign of eternity
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