The Perfect Fit

Choose the right size and ensure there will be no last minute problems.

A Solution is possible please use the following information.

In the Uk ring sizes are represented by letters of the alphabet with A being the smallest at 37.8mm working their way up to the largest, Z+10, at 77.4 mm.

If you wish to go direct to one of the following headings then please click on the one you want.

Size In Another Scale or Measurement.

In case you are unsure about your ring size or you want to double check it we at Jewellery by William.com offer a free ring gauge facility. You just need to click on the SIGN UP button after our instruction comment.

We recommend that you take advantage of this service even if you think you know your ring size as having to return rings for re-sizing is a hassle for everyone and especially when leading up to your special occasion.

Please note for certain types of rings, after you have placed an order with us we will automatically send you a ring sizer if you have not already requested one to ensure the ring you have ordered will fit comfortably.

Also known as a ring gauge, the finger sizer is a little plastic tie wrap with numbers/letters that easily and clearly display your finger size.

We at Jewellery by William.com find that many customers trying to choose the correct ring size find this a difficult process to complete as the finger size will vary from one hand to the other and one finger to the next. 

To make the process of choosing the best ring size for you as easy as possible we are offering all of our customers a free ring sizing gauge that allows you to find the perfect size in the comfort of your own home.


diagram 1diagram 2diagram 3

To receive your complimentary free ring size gauge, all you have to do is to click on the sign up button below and complete the short form with your name and full postal address.
It is recommended that you check all of your details entered as we can only dispatch your free ring sizing gauge to the address supplied.

Please note the free ring sizing gauge is available to UK postal addresses only and you can also be assured that your information will not be provided to any other third party.


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Size in Another Scale or Measurement?

If you know the finger size in another scale as used in a different country, you can use the following conversion chart to check the UK size comparisons.

Or if you know the inside diameter or circumference then you can also use the following chart to see the UK finger size equivalent.

Inside diameter

Inside circumference

Sizes

(in)

(mm)

(in)

(mm)

United States
and Canada

United Kingdom,
Ireland,
and Australia

Japan,
China

Switzerland

0.459

11.63

1.44

36.5

0




0.466

11.84

1.46

37.2




0.474

12.04

1.49

37.8

A



0.482

12.24

1.51

38.5

A1/2



0.490

12.45

1.54

39.1

1

B

1


0.498

12.65

1.56

39.7

1�

B1/2



0.506

12.85

1.59

40.4

1�

C



0.514

13.06

1.61

41.0

1�

C1/2



0.522

13.26

1.64

41.7

2

D

2

1.50

0.530

13.46

1.67

42.3

2�

D1/2



0.538

13.67

1.69

42.9

2�

E

3

2.75

0.546

13.87

1.72

43.6

2�

E1/2



0.554

14.07

1.74

44.2

3

F

4

4.00

0.562

14.27

1.77

44.8

3�

F1/2

5

5.25

0.570

14.48

1.79

45.5

3�

G



0.578

14.68

1.82

46.1

3�

G1/2

6

6.50

0.586

14.88

1.84

46.8

4

H

7


0.594

15.09

1.87

47.4

4�

H1/2


7.75

0.602

15.29

1.89

48.0

4�

I

8


0.610

15.49

1.92

48.7

4�

J


9.00

0.618

15.70

1.94

49.3

5

J1/2

9


0.626

15.90

1.97

50.0

5�

K


10.00

0.634

16.10

1.99

50.6

5�

K1/2

10


0.642

16.31

2.02

51.2

5�

L


11.75

0.650

16.51

2.04

51.9

6

L1/2

11

12.75

0.658

16.71

2.07

52.5

6�

M

12


0.666

16.92

2.09

53.1

6�

M1/2

13

14.00

0.674

17.12

2.12

53.8

6�

N



0.682

17.32

2.14

54.4

7

N1/2

14

15.25

0.690

17.53

2.17

55.1

7�

O



0.698

17.73

2.19

55.7

7�

O1/2

15

16.50

0.706

17.93

2.22

56.3

7�

P



0.714

18.14

2.24

57.0

8

P1/2

16

17.75

0.722

18.34

2.27

57.6

8�

Q



0.730

18.54

2.29

58.3

8�

Q1/2

17


0.738

18.75

2.32

58.9

8�

R


19.00

0.746

18.95

2.34

59.5

9

R1/2

18


0.754

19.15

2.37

60.2

9�

S


20.25

0.762

19.35

2.39

60.8

9�

S1/2

19


0.770

19.56

2.42

61.4

9�

T


21.50

0.778

19.76

2.44

62.1

10

T1/2

20


0.786

19.96

2.47

62.7

10�

U

21


0.794

20.17

2.49

63.4

10�

U1/2

22

22.75

0.802

20.37

2.52

64.0

10�

V



0.810

20.57

2.54

64.6

11

V1/2

23


0.818

20.78

2.57

65.3

11�

W


25.00

0.826

20.98

2.59

65.9

11�

W1/2

24


0.834

21.18

2.62

66.6

11�

X



0.842

21.39

2.65

67.2

12

X1/2

25

27.50

0.850

21.59

2.67

67.8

12�

Y



0.858

21.79

2.70

68.5

12�

Z

26

28.75

0.866

22.00

2.72

69.1

12�

Z1/2



0.874

22.20

2.75

69.7

13


27


0.882

22.40

2.77

70.4

13�

Z1



0.890

22.61

2.80

71.0

13�




0.898

22.81

2.82

71.7

13�

Z2



0.906

23.01

2.85

72.3

14

Z3



0.914

23.22

2.87

72.9

14�




0.922

23.42

2.90

73.6

14�

Z4



0.930

23.62

2.92

74.2

14�




0.938

23.83

2.95

74.8

15




0.946

24.03

2.97

75.5

15�




0.954

24.23

3.00

76.1

15�




0.962

24.43

3.02

76.8

15�




0.970

24.64

3.05

77.4

16




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How Can You Measure a Finger Size
.

Here are some suggestions and methods of determining a finger size.

How to measure a finger

1.Find a piece of string or strip of paper no wider than 1.4 cm (1/2 inches).

2.Wrap it around the base of the appropriate finger.

3.Use a pen to mark the point on the string/paper where it overlaps, forming a complete circle.

4.With a ruler, measure the length from the starting end of the string or paper to the pen mark.

5.Use this measurement and the chart on the right to determine your ring size.

6.For the most accurate reading, measure the finger at the end of the day when the finger is the largest.


Tips for measuring a ring size


1.After sliding the ring sizer on make sure it slides off fairly easily over the knuckle.

2.Do not measure cold fingers because this is when the finger is the smallest.

3.The most accurate time is the end of the day when the finger is the largest.


Tips for buying a ring as a surprise


Getting it just right can be tricky, but it�s not impossible.

1.First take the easy route ask your partners' parents or friends if they already know the finger size.

2.Borrow one of your partners rings (ensure it's from the right finger) and slide it down a tapered candle. Make a mark where it stops and then measure it and compare it to the chart on the right.






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Ring Size

Measured Size

( UK)

(mm)



G

45.5



H

46.7



I

48.0



J

48.7



K

49.9



L

51.2



M

52.5



N

53.8



O

55.0



P

56.3



Q

57.6



R

58.9



S

60.1



T

61.4



U

62.7



V

64.0



W

65.2



X

66.5



Y

67.8



Z

68.4