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Ring Size Help

At Diamond Rocks, we often get a lot of questions about ring size and how to calculate it.  That’s why we offer a ring size guide that can help you find the right fit.


Method One

Take a piece of thread, ribbon, string, or a thin strip of paper and wrap it around your finger, close to the knuckle. Make a mark where the two pieces overlap, measure against a millimetre ruler and this should give you the circumference of your finger.

Ring Size (UK) Circumference (mm) Ring Size (UK) Circumference (mm)
A 37.8 N 53.8
B 39.1 O 55.1
C 40.4 P 56.3
D 41.7 Q 57.6
E 42.9 R 58.9
F 44.2 S 60.2
G 45.5 T 61.4
H 46.8 U 62.7
I 48.0 V 64.0
J 48.7 W 65.3
K 50.0 X 66.6
L 51.2 Y 67.8
M 52.5 Z 68.5
Some Tips:
  • Make sure you're at a comfortable, normal temperature - Cold weather can cause your fingers to shrink by half a ring size, whereas hot weather, exercise, water retention caused by food, medication or illness can do the opposite.
  • Measure the exact finger you want the ring for - This may sound obvious, but the fingers on your dominant hand are larger than on your non-dominant hand, so don't assume the measurements will be the same.
  • Consider the width of the band - If you're looking for a ring with a deep band width, it will be tighter than a ring on a finer band and you may have to go for one size larger to accommodate.


Method Two

We can send you a free plastic ring sizer (as shown below) in the post. All you have to do is fill in the details in this form:

 How do you work out your ring size for jewellery?



Method Three

If you're still uncertain about yours or your partner's finger size, and you want a quick way to calculate it, you can download our printable ring strap sizer for an accurate indication.How do you work out ring size?

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