Sizing

How to Use the Chart

  • Measure the Inside Diameter: Use a ring that fits comfortably and measure the diameter across the centre in millimetres. This free app is a great help for accuracy with this task.
  • Locate Your Size: Find the measured diameter in the last column and read across to find the corresponding AUS/UK, US, and EU sizes.
  • Converting Sizes: If you know your size in one system (e.g., AUS/UK Size M), find it in the chart and read across to see the equivalent US and EU sizes.
  • Sizes start from A (smallest) and go up to Z5 (largest), including half sizes.
US Size AUS/UK Size EU Size Inside Diameter (mm)
A 12.04
A½ 12.24
B 12.45
B½ 12.65
C 12.85
C½ 13.06
D 13.26
D½ 13.46
E 13.67
E½ 13.87
F 14.07
F½ 14.27
3 G 44 14.48
G½ 14.68
3½ H 45 14.88
H½ 15.09
4 I 46 15.29
I½ 15.49
4½ J 47 15.70
J½ 48 15.90
5 K 49 16.10
K½ 16.31
5½ L 50 16.51
L½ 16.71
6 M 51 16.92
M½ 17.12
6½ N 52 17.32
N½ 17.53
7 O 53 17.73
O½ 17.93
7½ P 54 18.14
P½ 18.34
8 Q 55 18.54
Q½ 18.75
8½ R 56 18.95
R½ 19.15
9 S 57 19.35
S½ 19.56
9½ T 58 19.76
T½ 19.96
10 U 59 20.17
U½ 20.37
10½ V 60 20.57
V½ 20.78
11 W 61 20.98
W½ 21.18
11½ X 62 21.39
X½ 21.59
12 Y 63 21.79
Y½ 22.00
12½ Z 64 22.20
Z½ 22.40
13 Z1 65 22.60
Z1½ 22.80
13½ Z2 66 23.00
Z2½ 23.20
Z3 23.40
Z3½ 23.60
Z4 23.80
Z4½ 24.00
Z5 24.20

 

Tips for Accurate Measurement:

  • Time of Day: Measure your finger at the end of the day when it's largest.
  • Temperature: Ensure your hands are at normal body temperature.
  • Finger Size Variation: Your dominant hand may be slightly larger.
  • Ring Width: Wider bands fit more snugly; consider going up half a size.
  • Fingers swell after a few wines, and measurements 'may' be less accurate at these times.
  • Remember that comfort is key—it's better to have a ring that's slightly larger than one that's too tight.

Necklace Sizing