How to Measure Your Ring Size

How to Measure and Find Your Ring Size

If you’re considering buying a new ring, the new ring should fit your finger comfortably; snug enough so that it will not fall off, but loose enough to slide over your knuckle.

Finger Size

Finger size changes depending on the time of day and the weather. For best results measure your finger size:

  • At the end of the day and when your fingers are warm (Fingers are smaller in the early morning and when cold).
  • Measure finger size 3 to 4 times to eliminate an erroneous reading.

Avoid using string or paper to measure ring size as these materials can stretch or twist, yielding an inaccurate measurement.


Ring Sizes in the UK and Ireland

UK ring sizing measuring rings from A (the smallest) to Z. Half sizes are also available.

Women’s rings typically range from size G to R.

Men’s rings typically range from size P to Z.


HOW TO DETERMINE YOUR RING SIZE (pdf)



Ring Size (UK) Measure (mm) Ring Size (UK) MEASURE (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