International Ring Size Conversion Chart
US CA |
GB, AU NZ, IE |
DE BE |
FR | CH | IT | DIA (mm) |
Circ (mm) Europe / ISO |
---|---|---|---|---|---|---|---|
5 | J 1/2 | 15.75 | 9.5 | 15.7 | 49 | ||
5.5 | L | 16 | 51.75 | 11.75 | 10.5 | 16.1 | 51 |
6 | M | 16.5 | 52.75 | 12.75 | 11.5 | 16.51 | 52 |
6.5 | N | 17 | 54 | 14 | 13 | 16.92 | 53 |
7 | O | 17.25 | 55.25 | 15.25 | 14.5 | 17.35 | 55 |
7.5 | P | 17.75 | 56.5 | 16.5 | 16 | 17.75 | 56 |
8 | Q | 18 | 57.75 | 17.75 | 17 | 18.19 | 57 |
8.5 | Q 1/2 | 18.5 | 58 | 18.5 | 18.53 | 58 | |
9 | R 1/2 | 19 | 59.25 | 19 | 19.5 | 18.89 | 59 |
9.5 | S 1/2 | 19.5 | 60.5 | 21 | 19.41 | 61 | |
10 | T 1/2 | 20 | 61.75 | 20.25 | 22 | 19.84 | 62 |
10.5 | U 1/2 | 20.25 | 62.75 | 22.75 | 23.5 | 20.2 | 63 |
11 | V 1/2 | 20.75 | 64.25 | 25 | 25 | 20.68 | 65 |
11.5 | W 1/2 | 21 | 66 | 26.5 | 21.08 | 66 | |
12 | Y | 21.25 | 67.5 | 27.5 | 27.5 | 21.49 | 68 |
12.5 | Z | 21.75 | 68.75 | 28.75 | 28.5 | 21.89 | 69 |
13 | 22 | 30 | 22.33 | 70 |