Size Guide

Finding the perfect ring size is just as important as choosing the perfect design. At Searle & Co Jewellers, we want your ring to feel as comfortable as it is beautiful. Use our guide below to help determine the right size before you order or visit us in-store for expert assistance.

How to Measure Your Ring Size at Home

1. Measure with a Ring You Already Own

Choose a ring that fits comfortably on the finger you’ll wear your new ring.
Measure the inside diameter in millimetres.
Use the chart below to match your measurement to a UK ring size.

2. Measure Your Finger

Cut a thin strip of paper or use a piece of string.
Wrap it around the base of your finger – snug, but not too tight.
Mark where the ends meet and measure the length in millimetres.
Compare your measurement with the “finger circumference” column in the chart.

Ring Size Conversion Chart (UK Sizes)

UK Size	Inside Diameter (mm)	Finger Circumference (mm)
H	14.6	46.1
I	15.0	47.2
J	15.4	48.7
K	15.8	49.9
L	16.3	51.2
M	16.7	52.5
N	17.1	53.8
O	17.5	55.1
P	18.0	56.3
Q	18.4	57.6
R	18.8	58.9
S	19.2	60.2
T	19.6	61.4
U	20.0	62.7
V	20.4	64.0
W	20.8	65.3
X	21.2	66.6
Y	21.6	67.8
Z	22.0	68.5

Tips for Accurate Sizing

Measure at the end of the day: Fingers tend to be smaller in the morning and larger in the evening.
Consider the weather: Cold weather can shrink your fingers, while heat can make them swell.
Account for wider bands: A wide ring may feel tighter – you might prefer going up half a size.
Double-check your size: If you’re between sizes, we recommend choosing the larger one for comfort.

Still Unsure of Your Ring Size?

Visit us at Searle & Co Jewellers in the Royal Exchange and our team will be delighted to measure your finger professionally and guide you to the perfect fit.