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Help & Advise

At Dublin Diamond Factory, we believe jewellery should be more than beautiful—it should tell your story.
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Conversion Chart
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Ring Size Guide &
Conversion Chart

So you have found the perfect diamond ring, but how do you find your ring size? Whether you are buying an engagement ring for your partner or a wedding ring for yourself, our ring size guide UK provides the best tips on how to measure ring size at home.
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Conversion Chart

Our UK ring size conversion chart is designed to help you find your ring size at home. Just measure the ring size circumference of the finger you will be wearing the ring on, using a tape measure. Then use the ring size conversion chart to get your ring size and convert it.
UK Size APPROX US Size APPROX EU Size
C
1 3/4
40 1/2
D
2 1/4
41 1/2
E
2 3/4
42 3/4
F
3 1/4
44 1/2
G
3 3/4
45 1/2
H
4 1/4
46 1/2
I
4 3/4
47 3/4
J
5 1/4
49 1/2
K
5 1/2
50 1/4
L
6
51 1/2
M
6 1/2
52 1/2
N
7
7
O
7 1/2
55 1/4
P
8
56 1/4
Q
8 1/2
57 1/2
R
8 3/4
58 1/2
S
9 1/2
60 1/2
T
9 3/4
61 1/2
U
10 1/4
62 1/2
V
10 3/4
63 3/4
W
11 1/4
65 1/4
X
11 3/4
66 1/4
Y
12 1/4
67 1/2
Z
12 3/4
68 3/4

Order a free ring sizer

Don’t have a printer? No problem. We offer a free ring sizer tool that can be delivered straight to your door.
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How to measure a ring in secret

Buying an engagement ring or a surprise gift for your partner? Here are our top tips on how to find their ring size in secret.
Measure Ring

Ask a friend or family member. Someone close to your partner may already know their ring size or could even try and subtly ask them on your behalf.

Measure Ring

Measure an existing ring. If they already wear a ring on the finger in question, why not secretly measure it? You can either take the ring to a jeweller to be measured or print our ring size guide to measure it yourself.

Measure their finger while they are asleep. Although slightly trickier, you can measure your partner's finger using a piece of string whilst they are asleep. Just wrap it around the ring finger and tie a knot. Then using the string, measure it against our ring size guide.

Perfect engagement ring?
Head to our engagement ring to learn everything you need to know about finding an impressive ring for the one you love.
Engagement Rings
Ready to tie the knot?
Don’t have a printer? No problem. We offer a free ring sizer tool that can be delivered straight to your door.
Wedding Rings

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