Ring Size Guide

 Knowing your ring size

At A1 Jewellers we like to make sure that your online shopping experience is as easy and convenient as possible.

Whether you are buying a Indian ring, a white gold or yellow gold ring, a ring set with one carat or quarter carat diamonds, we understand the importance of getting the ring size right.

To find out your ring size, simply draw around the inside of a ring you know fits, preferably one with a similar width and style then measure the diameter. Then just use our conversion chart below to choose the closest size for you.


The A1 Jewellers free ring size service

The easiest and most accurate way to find your ring size is to have your finger measured by one of our friendly, trained and professional staff at out A1 Jewellers shop in Manchester if you live close by. We use an industry-standard ring sizer to quickly ascertain your ring size for you. If you are purchasing for a friend or a loved one, try to borrow one of their rings, preferably one with a similar width and style, and take it along with you to be measured.

If you do not live close by then you can visit your nearest Jewellery and ask to have them measure your ring size for you.

Ring size conversion chart

UK Ring Size US Ring Size Internal Diameter of Ring(mm)
A 0.5 11.5mm
B 1 12.3mm
C 1.5 12.7mm
D 2 13.1mm
E 2.5 13.5mm
F 3 13.9mm
G 3.25 14.3mm
H 3.75 14.7mm
I 4.25 15.1mm
J 4.75 15.5mm
K 5.25 15.9mm
L 5.75 16.3mm
M 6.25 16.7mm
N 6.75 17.1mm
O 7 17.5mm
P 7.5 17.9mm
Q 8 18.3mm
R 8.5 18.7mm
S 9 19.1mm
T 9.5 19.5mm
U 10 19.9mm
V 10.5 20.3mm
W 11 20.7mm
X 11.5 21.1mm
Y 12 21.5mm
Z 12.5 21.9mm