Rings Size Guide UK
22.03.2022
How do rings size work? Ring sizes have a scale of A to Z. So, A is the smallest size, and Z is the largest. Each letter represents the circumference of the ring in mm. Most jewellers offer half sizes so that you can get the most accurate and comfortable fit.
|
Circumference Diameter |
UK Rings Size | US Rings Size | EU Rings Size |
| C: 37.8 mm D: 12.0 mm |
A | 1/2 | - |
| C: 39.1 mm D: 12.4 mm |
B | 1 | - |
| C: 40.4 mm D: 12.8 mm |
C | 1 1/2 | 40 1/2 |
| C: 41.7 mm D: 13.2 mm |
D | 2 | 41 1/2 |
| C: 42.9 mm D: 13.6 mm |
E | 2 1/2 | 42 3/4 |
| C: 44.2 mm D: 14.1mm |
F | 3 | 44 |
| C: 45.5 mm D: 14.4 mm |
G | 3 1/2 | 45 1/4 |
| C: 46.8 mm D: 14.8 mm |
H | 4 | 46 1/2 |
| C: 48.0 mm D: 15.2 mm |
I | 4 1/2 | 47 1/8 |
| C: 48.7 mm D: 15.4 mm |
J | 4 3/4 | 48 3/8 |
| C: 50.0 mm D: 15.9 mm |
K | 5 1/4 | 49 5/8 |
| C: 51.2 mm D: 16.3 mm |
L | 5 3/4 | 50 7/8 |
| C: 52.5 mm D: 16.7 mm |
M | 6 1/4 | 52 1/8 |
| C: 53.8 mm D: 17.1 mm |
N | 6 3/4 | 53 3/8 |
| C: 55.1 mm D: 17.5 mm |
O | 7 | 54 5/8 |
| C: 56.3 mm D: 17.9 mm |
P | 7 1/2 | 55 7/8 |
| C: 57.6 mm D: 18.3 mm |
Q | 8 | 57 1/8 |
| C: 58.9 mm D: 18.7 mm |
R | 8 1/2 | 58 3/8 |
| C: 60.2 mm D: 19.1 mm |
S | 9 | 59 5/8 |
| C: 61.4 mm D: 19.5 mm |
T | 9 3/4 | 60 7/8 |
| C: 62.7 mm D: 19.9 mm |
U | 10 1/4 | 62 1/8 |
| C: 64.0 mm D: 20.3 mm |
V | 6 3/4 | 63 3/8 |
| C: 65.3 mm D: 20.7 mm |
W | 11 1/4 | 64 5/8 |
| C: 66.6 mm D: 21.1 mm |
X | 11 3/4 | 65 7/8 |
| C: 57.8 mm D: 21.5 mm |
Y | 12 | 67 1/8 |
| C: 68.5 mm D: 21.7 mm |
Z | 12 1/2 | 67 3/4 |