Ring Sizes

RING SIZES

In determining ring sizes please refer to the chart below. Please note that ring size varies between left and right hands and between fingers. If in doubt, please visit any jeweller for an accurate ring size measurement for all fingers including index, middle and ring fingers on both hands.  

 

AUSTRALIAN
SIZING

NUMBER SIZES
US/CANADA
STANDARD

INSIDE
DIAMETER
(inches)

INSIDE
DIAMETER
(mm)

H

4

0.586

14.9

H 1/2

4 1/4

0.594

15.1

I

4 1/2

0.602

15.3

J

4 3/4

0.610

15.5

J 1/2

5

0.618

15.7

K

5 1/4

0.626

15.9

K 1/2

5 1/2

0.634

16.1

L

5 3/4

0.642

16.3

L 1/2

6

0.650

16.5

M

6 1/4

0.658

16.7

M 1/2

6 1/2

0.666

16.9

N

6 3/4

0.674

17.1

N 1/2

7

0.682

17.3

O

7 1/4

0.690

17.5

O 1/2

7 1/2

0.698

17.7

P

7 3/4

0.706

17.9

P 1/2

8

0.714

18.1

Q

8 1/4

0.722

18.3

Q 1/2

8 1/2

0.730

18.5

R

8 3/4

0.738

18.7

R 1/2

9

0.746

18.9

S

9 1/4

0.754

19.2

S 1/2

9 1/2

0.762

19.4

T

9 3/4

0.770

19.6

T 1/2

10

0.778

19.8