Ring Size Charts

Ring Size Charts

Find your UK ring size with our chart and simple measuring guide. UK ring sizes use letters, from smaller sizes near the start of the alphabet to larger sizes near Z. Use the inside diameter of a ring that already fits, or the circumference of your finger, and match it to the closest size below.

UK ring size chart

UK size Inside diameter Inside circumference
F 14.1 mm 44.2 mm
G 14.5 mm 45.5 mm
H 14.9 mm 46.8 mm
I 15.3 mm 48.0 mm
J 15.5 mm 48.7 mm
K 15.9 mm 50.0 mm
L 16.3 mm 51.2 mm
M 16.7 mm 52.5 mm
N 17.1 mm 53.8 mm
O 17.5 mm 55.1 mm
P 17.9 mm 56.3 mm
Q 18.3 mm 57.6 mm
R 18.8 mm 58.9 mm
S 19.2 mm 60.2 mm
T 19.6 mm 61.4 mm
U 20.0 mm 62.7 mm
V 20.4 mm 64.0 mm
W 20.8 mm 65.3 mm
X 21.2 mm 66.6 mm
Y 21.6 mm 67.8 mm
Z 21.8 mm 68.5 mm

Measurements are approximate and can vary slightly between jewellers. Each full UK size is roughly 1.25 mm larger in circumference than the one before.

How to measure your ring size

Method 1: measure a ring that fits

  1. Choose a ring that fits the finger you want to wear your new ring on.
  2. Lay it flat on a ruler and measure straight across the inside, from inner edge to inner edge, in millimetres.
  3. Match that inside diameter to the chart above.

Method 2: measure your finger

  1. Wrap a thin strip of paper or a piece of string around the base of your finger.
  2. Mark the point where it overlaps, then lay it flat and measure the length in millimetres.
  3. Match that circumference to the chart above.

Tips for an accurate fit

  • Measure at the end of the day, when your fingers are at their largest, and avoid measuring when your hands are cold.
  • Make sure the ring will slide over your knuckle comfortably.
  • If you are between two sizes, choose the larger size.
  • Measure two or three times to be sure.

Need help choosing a size? Email us at denoonlondon@gmail.com and we'll be happy to help.

Ring size chart – Denoon London