Having your finger sized by a professional jeweller is the most accurate way of finding your ring size. However if you do need to do this at home, this ring sizing chart might come in handy.
If you know your US ring size, you can convert it to your Australian ring size below.
If you have a ring that fits on the finger you are buying, measure its inner diameter. The inner diameter is the measurement of the widest point on the inside of a ring. Use the chart below to convert the inner diameter to a ring size.
|
Inner diameter
|
AU/UK sizing
|
US sizing
|
|
12.04
|
A
|
¼
|
|
12.24
|
A½
|
¾
|
|
12.45
|
B
|
1
|
|
12.65
|
B½
|
1¼
|
|
12.90
|
C
|
1½
|
|
13.06
|
C½
|
1¾
|
|
13.26
|
D
|
2
|
|
13.46
|
D½
|
2¼
|
|
13.66
|
E
|
2½
|
|
13.87
|
E½
|
2¾
|
|
14.07
|
F
|
3
|
|
14.17
|
F½
|
3⅛
|
|
14.38
|
G
|
3⅜
|
|
14.58
|
G½
|
3⅝
|
|
14.80
|
H
|
3¾
|
|
15.00
|
H½
|
4
|
|
15.20
|
I
|
4¼
|
|
15.40
|
I½
|
4½
|
|
15.60
|
J
|
4¾
|
|
15.80
|
J½
|
5
|
|
16.00
|
K
|
5¼
|
|
16.20
|
K½
|
5½
|
|
16.40
|
L
|
5¾
|
|
16.60
|
L½
|
6
|
|
16.80
|
M
|
6¼
|
|
17.00
|
M½
|
6½
|
|
17.20
|
N
|
6¾
|
|
17.40
|
N½
|
7
|
|
17.60
|
O
|
7¼
|
|
17.80
|
O½
|
7½
|
|
18.00
|
P
|
7¾
|
|
18.20
|
P½
|
8
|
|
18.40
|
Q
|
8¼
|
|
18.60
|
Q½
|
8½
|
|
18.80
|
R
|
8¾
|
|
19.00
|
R½
|
9
|
|
19.20
|
S
|
9¼
|
|
19.40
|
S½
|
9½
|
|
19.60
|
T
|
9¾
|
|
19.80
|
T½
|
10
|
|
20.00
|
U
|
10¼
|
|
20.20
|
U½
|
10½
|
|
20.40
|
V
|
10¾
|
|
20.60
|
V½
|
11
|
|
20.80
|
W
|
11¼
|
|
21.00
|
W½
|
11½
|
|
21.20
|
X
|
11¾
|
|
21.40
|
X½
|
12
|
|
21.60
|
Y
|
12¼
|
|
21.80
|
Y½
|
12½
|
|
22.00
|
Z
|
12¾
|
|
