If you already know your ring size but need to convert the unit of measurement then please use the matrix below:
UK Ring Size | EU Ring Size | US Ring Size | Measure in MM |
D | | 2 | |
| | | |
| 42 | | 42 |
| | | |
E | | 2 1/2 | |
| 43 | | 43 |
| | | |
| | | |
F | 44 | 3 | 44 |
| | | |
| | | |
| 45 | | 45 |
G | | 3 1/2 | |
| | | |
| 46 | | 46 |
| | | |
H | | 4 | |
| 47 | | 47 |
| | | |
| | | |
I | 48 | 4 1/2 | 48 |
| | | |
| | | |
| | | |
J | 49 | 5 | 49 |
| | | |
| | | |
| 50 | | 50 |
K | | 5 1/2 | |
| | | |
| 51 | | 51 |
| | | |
L | | 6 | |
| 52 | | 52 |
| | | |
| | | |
M | 53 | 6 1/2 | 53 |
| | | |
| | | |
| 54 | | 54 |
N | | 7 | |
| | | |
| 55 | | 55 |
| | | |
O | | 7 1/2 | |
| 56 | | 56 |
| | | |
| | | |
P | 57 | 8 | 57 |
| | | |
| | | |
| | | |
Q | 58 | 8 1/2 | 58 |
| | | |
| | | |
| 59 | | 59 |
R | | 9 | |
| | | |
| 60 | | 60 |
| | | |
S | | 9 1/2 | |
| 61 | | 61 |
| | | |
| | | |
T | 62 | 10 | 62 |
| | | |
| | | |
| 63 | | 63 |
U | | 10 1/2 | |
| | | |
| 64 | | 64 |
| | | |
V | | 11 | |
| 65 | | 65 |
| | | |
| | | |
W | 66 | 11 1/2 | 66 |
| | | |
| | | |
| 67 | | 67 |
X | | 12 | |
| | | |
| | | |
| 68 | | 68 |
Y | | 12 1/2 | |
| | | |
| 69 | | 69 |
| | | |
Z | | 13 | |
| 70 | | 70 |
| | | |
| | | |
Z+1 | 71 | 13 1/2 | 71 |