Tomasz Donocik uses standard UK ring sizes and refers to the inside ring diameter as the most accurate measurement. The suggested US, European and Japanese sizes in the table below are simply a reference.
If you are hesitating between two sizes, choose the larger size. Please note that rings of the same size may have a slightly different fit depending on the design.
If in doubt or if you cannot find your ring size please contact sales@tomaszdonocik.com.
UK | USA & Canada | Europe | Japan | Ring Diameter Inside MM |
J | 4 1/2 | 49 | - | 15.4 |
K | 5 | 50 | 9 | 15.8 |
K 1/2 | 5 3/8 | - | 10 | 16 |
L | 5 1/2 | 51 | - | 16.1 |
M | 6 | 52 | 12 | 16.51 |
M 1/2 | 6 1/4 | - | - | 16.71 |
N | 6 1/2 | 53 | 13 | 16.92 |
N 1/2 | 6 3/4 | 54 | - | 17.13 |
O | 7 | 55 | 14 | 17.35 |
O 1/2 | 7 1/4 | - | - | 17.45 |
P | 7 1/2 | 56 | 15 | 17.75 |
P 1/2 | 7 3/4 | - | - | 17.97 |
Q | 8 | 57 | 16 | 18.19 |
Q 1/2 | 8 1/4 | 58 | - | 18.35 |
Q 3/4 | 8 1/2 | - | 17 | 18.53 |
R | 8 5/8 | 59 | - | 18.61 |
R 3/4 | 9 | - | 18 | 18.89 |
S | 9 1/8 | 60 | - | 19.1 |
S 3/4 | 9 1/2 | - | 19 | 19.41 |
T | 9 5/8 | 61 | - | 19.51 |
T 1/2 | 10 | - | 20 | 19.84 |
U | 10 1/4 | 62 | 21 | 20.02 |
U 1/2 | 10 1/2 | - | 22 | 20.2 |
V | 10 5/8 | 63 | - | 20.32 |
V 1/2 | 11 | - | 23 | 20.68 |
W | 11 1/8 | 65 | - | 20.76 |