How to Determine Ring Size | Chart & Measure Guide?

Jan 10, 2025
How to Determine Ring Size | Chart & Measure Guide?

How to Determine Ring Size | Chart & Measure Guide?

Using a ring sizer (ring size calculator)

Read on if you’re looking for help to measure in order to make a new purchase or just want to check your size before a special occasion. Making sure your ring feels comfortable and secure, and avoiding common mistakes, with our step by step instructions. Read our advice and you'll avoid the common pitfalls and help your ring fit comfortably and securely. Get the guide today and be sure your next ring buy is fitted like a dream.

Ring size chart

You use ring size charts to compare your finger measurement with different sizes around the world. There are different sizing systems applied in different countries: numbers in US and Canada, letters in the UK, and millimeter circumferences in Europe. 


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There are these differences of historical and measurement for these; so the size that people have in one country doesn’t fit in the other country. If you do buy international rings, take it from me that getting a ring size chart to convert and comparing ring sizes between systems can prove very fruitful if you get a nice fit when you buy rings abroad.

 

US/Canada

 

UK/Australia

 

Europe

 

Japan

 

Switzerland

 

4.0

 

H

 

46.5

 

7

 

7.75

 

4.5

 

I

 

48.0

 

8

 

8.5

 

5.0

 

J

 

49.0

 

9

 

9.25

 

5.5

 

K

 

50.3

 

10

 

9.75

 

6.0

 

L

 

51.5

 

11

 

10.25

 

6.5

 

M

 

53.1

 

12

 

11.0

 

7.0

 

N

 

54.4

 

13

 

11.75

 

7.5

 

O

 

55.7

 

14

 

12.25

 

8.0

 

P

 

57.0

 

15

 

13.0

 

8.5

 

Q

 

58.3

 

16

 

13.5

 

9.0

 

R

 

59.5

 

17

 

14.25

 

9.5

 

S

 

60.8

 

18

 

15.0

 

10.0

 

T

 

62.1

 

19

 

15.75

 

10.5

 

U

 

63.4

 

20

 

16.25

 

11.0

 

V

 

64.6

 

21

 

17.0

 

11.5

 

W

 

65.9

 

22

 

17.75

 

12.0

 

X

 

67.2

 

23

 

18.25

 

12.5

 

Y

 

68.5

 

24

 

19.0

 

13.0

 

Z

 

69.7

 

25

 

19.75

 

13.5

 

Z+1

 

71.0

 

26

 

20.25

 

14.0

 

Z+2

 

72.3

 

27

 

21.0

 

14.5

 

Z+3

 

73.6

 

28

 

21.75

 

15.0

 

 

74.8

 

29

 

22.5

 


Ring size by cm or inches 

Ring sizes in the US and Canada are numerical and don’t really correlate with inches or centimeters. The internal diameter or circumference of the ring is what we use to get the sizes, but the size numbers themselves are part of a standardized scale.


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Unlike in the UK and Australia, the ring sizes are done by an alphabetical system, rather than directly related to measurements by inches or centimeters. These sizes also resemble the US system (size of the US sizes only are internally corresponding to special internal circumferences or diameters, but these sizes letters are a special scale.) 

At what point in your life is it best to know your ring size?

To get your exact ring size it's best to time your measurement in the evening. We were born with flexible fingers which range in size throughout the day and are best measured at their biggest when buying to ensure your ring is comfortable. Fingers will swell at some point during the day and they’ll be at their biggest by the evening. Don't measure the circumference of your fingers when they're cold — they can be at least half a size too small. We suggest you take the time to measure twice because we want your ring size as accurate as possible.

How to Determine the Ring Size?

There are other ways to find the ring size.


  • The simplest way to determine the proper ring size is to just ask her (or him). You have chances you have probably talked away once or twice which lets you lay into chat about the size.

  • Ask Family/Friends: You can go ask her sisters, mom, best friends for help in making this a complete surprise. 


One of them will be the only ones to know, if anyone (not included) is. Trust me, girls do talk about everything lol. Derive and use the String and Ruler Method. Second, wrap a string or thin piece of paper around the base of the finger (make sure it’s the left ring finger, if an engagement ring). Using a pen, mark where the ends meet. Measure with the printable ring sizer above, lay it flat.


Use the String and Ruler Method: An engagement ring to be wrapped around the base of the finger (be sure it's the left ring finger), string or thin piece of paper. Use a pen to mark where the ends meet. 


Use a Ring She Already Owns: This is a harder one because you have to make sure it's a ring that she wears ‘that’ finger or it’s useless. If you can get your hands on a ring, you can match it up with our printable ring sizer:

What Signs Would I See that I am Arriving at My Size?

In the end that should tell you if the ring is the right size when it goes on easily, it doesn’t dig into your skin when you wear it all day and your fingers don’t wiggle it off. 


To find the most accurate measurement, we do have some pro tips. So if you already have a collection of rings then which is the most comfortable and which ring do you automatically put your hand into? Your ideal ring size is that ring.


If you are measuring from scratch, make sure you measure from the base of your finger near where your knuckle meets the nape, where the ring will sit on. Also, knit the knuckle and if it is significantly bigger.


READ MORE :: Tips for Finding the Perfect Ring Size for Comfort and Style

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