
UK Ring Size Chart
Number 1: Use a piece of string
– Comfortably wrap a piece of string around the intended finger.
– With a pen mark the where the string meets
– Measure the length of the string with a ruler…this is the circumference.
– Check the measurement with our chart
Size Chart
RING SIZE | CIRCUMFERENCE (MM) |
A | 37.5 |
B | 38.8 |
C | 40 |
D | 41.5 |
E | 42.7 |
F | 44 |
G | 45 |
H | 46 |
I | 47.2 |
J | 48.3 |
K | 49.6 |
L | 50.5 |
M | 51.8 |
N | 53.1 |
O | 54.5 |
P | 55.7 |
Q | 57.1 |
R | 58.4 |
S | 60 |
T | 61.2 |
U | 62.8 |
V | 63.8 |
W | 65.2 |
X | 66.5 |
Y | 67.5 |
Z | 68.7 |
Number 2: Head to Hatton Garden Diamond in Hatton Garden

Visit Our Hatton Garden Showroom
Our friendly team of experts are here to assist you with any queries you may have. If you are local to London and find yourself in Farringdon or Chancery Lane, head down to our store and they will happily size your finger free of charge. We are here seven days a week for you, it would be our pleasure to assist you with this special purchase.
Hatton Garden Diamond
13 Hatton Garden, London EC1N 8AN
Tel: 020 7404 9202