A close-up of hands holding a set of silver metal key rings and a matching keyring, with another person's hands visible in the background holding a single ring.

Ring Sizing Guide

The simplest way to work out your ring size is to measure a ring you already own for a ring that will go on the same finger (note that fingers on different hands can be different sizes).

To do this you just take a ruler and measure straight across the inside of the ring from inside edge to edge. Take the diameter measurement in inches or mm, and then use our measurement-conversion chart to find your ring size.

If you don't have a ring of the same size:

Take a piece of string or paper and rap it around the base of the finger to measure.
Use a pen to mark the point on the string or paper where it overlaps.
Take a ruler and measure the length of the string or paper from the starting end, to the end you marked with the pen.
Use this measurement and compare it against the chart below to determine your ring size.

View ring sizing page

Inside Diameter		Inside Circumference
inches	mm	inches	mm	UK
0.52	13.2	1.63	41.5	D
0.53	13.5	1.68	42.76	E
0.55	13.97	1.74	44.14	F
0.56	14.38	1.77	45.11	G
0.58	14.88	1.81	46.02	H
0.59	15.1	1.86	47.25	I
0.6	15.49	1.9	48.38	J
0.62	15.9	1.95	49.64	K
0.64	16.31	1.99	50.58	L
0.65	16.71	2.04	51.87	M
0.67	17.12	2.09	53.16	N
0.69	17.53	2.15	54.51	O
0.7	17.93	2.2	55.76	P
0.72	18.34	2.25	57.15	Q
0.73	18.75	2.3	58.47	R
0.75	19.15	2.36	60	S
0.77	19.56	2.41	61.29	T
0.78	19.81	2.48	62.89	U
0.79	20.17	2.51	63.84	V
0.81	20.61	2.57	65.22	W
0.83	20.99	2.62	66.54	X
0.84	21.32	2.66	67.51	Y
0.85	21.71	2.71	68.77	Z
0.87	22.1	2.73	69.43	Z+