Ring Size Guide

Ring Sizing

There are a number of ring sizing systems in use around the world. We use the UK ring sizing system. Please use the conversion chart below to calculate your UK ring size.

There are 3 ways to determine your ring size:-

1. If you already have a ring that fits your chosen finger, measure the inside diameter of the ring in millimetres and use the conversion chart below to determine your UK ring size.

2. Visit your local jeweller and ask them to size your finger.

3. Contact us and we will send you a free ring sizer.

COMPARATIVE RING SIZES

UK
EU
USA
Diameter (mm)
Circumference(mm)
I
8
4.5
15.2
47.50
J
9
5
15.52
48.75
K
10
5.5
15.90
50.00
L
11
6
16.30
51.25
M
12
6.5
16.60
52.50
N
14
7
17.20
53.75
O
15
7.5
17.50
55.00
P
16
8
17.80
56.25
Q
17
8.5
18.30
57.50
R
19
9
18.60
58.75
S
20
9.5
19.10
60.00
T
21
10
19.50
61.25
U
23
10.5
19.90
62.50
V
24
11
20.30
63.75
W
25
11.5
20.50
65.00
X
26
12
20.80
66.25
Y
27
12.5
21.20
67.50

Every effort has been made to ensure that the above information is correct however the best method to determine your correct ring size is to visit your local jeweller or order a finger-sizing tool that we will be happy to send you free of charge.

Ring Stretching & Reducing
It is possible to stretch or reduce most rings. If you have a ring that requires re-sizing please contact Kathryn King Designer Jeweller Ltd for further information.

Hallmarks
All jewellery at Kathryn King Designer Jeweller Ltd conforms to United Kingdom hallmarking standards.

Presentation
Each piece of jewellery is supplied in a unique Kathryn King Designer Jeweller presentation box.