About Size
About size indication
All PRIORITY DIAMOND rings are in Japan size. Please refer to the table below for inner diameter and US size.
If you are unsure of your size, you can find out a rough estimate by wrapping the thread around your finger, marking a landmark, and then measuring the length of the stretched item and checking it against the inner circumference of the table below.
Diameter (Diameter) |
Circumference (Inner circumference) |
Japan Size (JCS) |
US Size |
13.7mm | 42.9 mm | #3 | #2.5 |
14.0 mm | 44.0mm | #4 | #3 |
14.4 mm | 45.0 mm | #5 | #3.5 |
14.7mm | 46.1 mm | #6 | #3.5 - #4 |
15.0 mm | 47.1 mm | #7 | #4 |
15.4 mm | 48.2 mm | #8 | #4.5 - #5 |
15.7mm | 49.2mm | #9 | #5 |
16.0mm | 50.3 mm | #10 | #5.5 |
16.4 mm | 51.3 mm | #11 | #6 |
16.7mm | 52.4 mm | #12 | #6.5 |
17.0mm | 53.4 mm. | #13 | #6.5 - #7 |
17.4 mm | 54.5mm | #14 | #7 - #7.5 |
17.7mm | 55.5mm | #15 | #7.5 - #8 |
18.0mm | 56.6 mm | #16 | #8 |
18.4 mm | 57.6 mm | #17 | #8.5 |
18.7mm | 58.6 mm. | #18 | #9 |
19.0mm | 59.7 mm. | #19 | #9.5 |
19.4 mm | 60.7 mm | #20 | #10 |
19.7mm | 61.8 mm | #21 | #10 - #10.5 |
20.0mm | 62.8 mm | #22 | #10.5 |
20.4 mm | 63.9 mm | #23 | #11 |
20.7mm | 64.9 mm | #24 | #11.5 |
PRIORITY DIAMOND SELLS TWO TYPES OF SIZING PRODUCTS THAT ALLOW YOU TO MEASURE YOUR FINGER SIZE AT HOME. YOU CAN CHECK THE SIZE OF YOUR OR YOUR PARTNER'S FINGER EASILY AND ORDER A RING WITH CONFIDENCE.
700 yen (including tax and shipping)
300 yen (including tax and shipping costs)