SIZE GUIDE
Sirciam rings are available in most of the sizes listed below.
We do offer quarter sizes by special request :)
Use the ‘add order note’ button (found in the shopping cart area) to let us know of the desired size.
Ring Sizes
INTERNAL DIAMETER | USA CANADA |
UK | EUROPE | JAPAN |
---|---|---|---|---|
13.7 mm | 2.5 | E | 42 3/4 | 3 |
14.1 mm | 3 | F | 44 | 4 |
14.5 mm | 3.5 | G | 45 /14 | 5 |
14.8 mm | 4 | H 1/2 | 46 1/2 | 7 |
15.2 mm | 4.5 | I 1/2 | 47 3/4 | 8 |
15.7mm | 5 | J 1/2 | 50 | 9 |
16.1mm | 5.5 | L | 51 3/4 | 10 1/2 |
16.5mm | 6 | M | 52 3/4 | 11 1/2 |
16.9 mm | 6.5 | N | 54 | 13 |
17.3 mm | 7 | O | 55 1/4 | 14 |
17.7 mm | 7.5 | P | 56 1/2 | 15 |
18.2 mm | 8 | Q | 57 3/4 | 16 |
18.5 mm | 8.5 | Q 1/2 | 58 1/2 | 17 |
18.9 mm | 9 | R 1/2 | 60 | 18 |
19.4 mm | 9.5 | S 1/2 | 61 1/2 | 19 |
19.8 mm | 10 | T 1/2 | 62 1/4 | 20 |
20.2 mm | 10.5 | U 1/2 | 63 | 22 |
20.7 mm | 11 | V 1/2 | 64 1/2 | 23 |
21.1 mm | 11.5 | W 1/2 | 66 1/4 | 24 |
21.5 mm | 12 | Y | 67 1/2 | 25 |
21.9 mm | 12.5 | Z | 68 3/7 | 26 |
22 mm | 13 | Z+1 | 70 | 27 |