Ring sizing chart

The best and most reliable way to find your ring size is to visit a local jewellery store and have your size professionally measured. If this is not possible, you may use a ring you already own and determine its internal diameter with a ruler. Measure from the widest point of the inside of the ring and refer to the chart below to find your size.

You may also measure your finger with a piece of string or paper to find your size. Wrap the string/paper comfortably around your finger and mark where it overlaps. Measure the length and refer to the chart below to find your size.
 AU ring size US ring size Internal Diameter (mm) Circumference of finger (mm)
F 1/2 3 14.1 44.2
G 3 1/4 14.3 44.8
G 1/2 3 1/2 14.5 45.5
H 3 3/4 14.7 46.1

H 1/2

 4 14.9 46.8

I

 4 1/4 15.1 47.4

I 1/2

 4 1/2 15.3 48

J

 4 3/4 15.5 48.7

J 1/2

 5 15.7 49.3

K

 5 1/4 15.9 50

K 1/2

 5 1/2 16.1 50.6

L

 5 3/4 16.3 51.2

L 1/2

 6 16.5 51.9

M

 6 1/4 16.7 52.5

M 1/2

 6 1/2 16.9 53.1

N 

 6 3/4 17.1 53.8

N 1/2

 7 17.3 54.4

O 

 7 1/4 17.5 55.1

O 1/2

 7 1/2 17.7 55.7

P

 7 3/4 17.9 56.3

P 1/2

 8 18.1 57

Q

 8 1/4 18.3 57.6

Q 1/2

 8 1/2 18.5 58.3

R

 8 3/4 18.8 58.9

R 1/2

 9 19 59.5

S

 9 1/4 19.2 60.2

S 1/2

 9 1/2 19.4 60.8

T

 9 3/4 19.6 61.4

T 1/2

 10 19.8 62.1

U

 10 1/4 20 62.7

U 1/2

 10 1/2 20.2 63.4

V 

 10 3/4 20.4 64

V 1/2

 11 20.6 64.6

W

 11 1/4 20.8 65.3

W 1/2

 11 1/2 21 65.9

X 

 11 3/4 21.2 66.6

X 1/2

 12 21.4 67.2

Y

 12 1/4 21.6 67.8

Y 1/2

 12 1/2 21.8 68.5

Z

 12 3/4 22 69.1

Z 1/2

 13 22.2 69.7