J&I Size Guide
- Have an existing ring that fits, simply measure the inside diameter of the ring and match to find your ring size in the chart below
- Knowing your ring size but not in Australian size, convert it by the chart below
Please use the chart below to find your ring size.
FINGER CIRCUMFERENCE | INSIDE DIAMETER OF THE RING | AU | US |
44.20mm | 14.07mm | F | 3 |
44.80mm | 14.27mm | F 1/2 | 3 1/4 |
45.50mm | 14.48mm | G | 3 1/2 |
46.10mm | 14.68mm | G 1/2 | 3.75 |
46.80mm | 14.88mm | H | 4 |
47.40mm | 15.09mm | H 1/2 | 4 1/4 |
48.00mm | 15.29mm | I | 4 1/2 |
48.70mm | 15.49mm | J | 4.75 |
49.30mm | 15.70mm | J 1/2 | 5 |
50mm | 15.90mm | K | 5 1/4 |
50.60mm | 16.10mm | K 1/2 | 5 1/2 |
51.20mm | 16.31mm | L | 5.75 |
51.90mm | 16.51mm | L 1/2 | 6 |
52.50mm | 16.71mm | M | 6.25 |
53.10mm | 16.92mm | M 1/2 | 6 1/2 |
53.80mm | 17.12mm | N | 6 3/4 |
54.40mm | 17.32mm | N 1/2 | 7 |
55.10mm | 17.52mm | O | 7.25 |
55.40mm | 17.73mm | O 1/2 | 7 1/2 |
56.30mm | 17.93mm | P | 7 3/4 |
57.00mm | 18.40mm | P 1/2 | 8 |
57.60mm | 18.34mm | Q | 8.25 |
58.30mm | 18.54mm | Q 1/2 | 8 1/2 |
58.90mm | 18.75mm | R | 8 3/4 |
59.50mm | 18.95mm | R 1/2 | 9 |
60.20mm | 19.15mm | S | 9.25 |
60.80mm | 19.35mm | S 1/2 | 9.5 |
61.40mm | 19.56mm | T | 9.75 |
62.10mm | 19.76mm | T 1/2 | 10 |
62.70mm | 19.96mm | U | 10 1/4 |
63.40mm | 20.17mm | U 1/2 | 10 1/2 |
64.00mm | 20.37mm | V | 10.75 |
64.60mm | 20.57mm | V 1/2 | 11 |
65.30mm | 20.78mm | W | 11 1/4 |
65.90mm | 20.98mm | W 1/2 | 11 1/2 |
66.60mm | 21.18mm | X | 11.75 |
67.20mm | 21.39mm | X 1/2 | 12 |
67.80mm | 21.59mm | Y | 12 1/4 |
68.50mm | 22.00mm | Z | 12 1/2 |
22.3mm | 70.1mm | Z +1/2 | 13 |
22.4mm | 70.4mm | Z+1 | - |
22.7mm | 71.3mm | Z+2 | 13.5 |
22.9mm | 71.9mm | Z+3 | - |
23.2mm | 72.9mm | Z+4 | 14 |
23.5mm | 73.8mm | Z+5 | 14 1/2 |
23.8mm | 74.8mm | Z+6 | 15 |
24.2mm | 76mm | Z+7 | 15 1/2 |