Ring sizes - CHART

How to define a ring size?

1. Measure the diameter of any other ring that fits a given finger. Read out the ring size that matches the diameter.

2.Measure a finger’s circumference. Read out the size matching the circumference.

Please remember that ring sizes are measured up to 1/10 of millimeter. So the difference between two adjacent sizes might be so small that insignificant and be in the measurement – ballpark.

Ring sizes Poland	Ring sizes UK	Ring sizes USA	Inside diameter in millimeters	Inside circumference in millimeters
5	G	3¼	14.30 mm	45 mm
6	H		14.60 mm	46 mm
7	H½	4	15.00 mm	47 mm
8	I½	4½	15.30 mm	48 mm
9	J		15.60 mm	49 mm
10	K	5¼	15.90 mm	50 mm
11	L		16.20 mm	51 mm
12	L½	6	16.50 mm	52 mm
13	M½	6½	16.80 mm	53 mm
14	N		17.20 mm	54 mm
15	O	7¼	17.50 mm	55 mm
16	O½	7½	17.80 mm	56 mm
17	P½	8	18.10 mm	57 mm
18	Q		18.40 mm	58 mm
19	R		18.80 mm	59 mm
20	S	9¼	19.10 mm	60 mm
21	S½	9½	19.40 mm	61 mm
22	T½	10	19.70 mm	62 mm
23	U	10¼	20.00 mm	63 mm
24	V		20.30 mm	64 mm
25	V½	11	20.60 mm	65 mm
26	W½	11½	21.00 mm	66 mm
27	X½	12	21.30 mm	67 mm
28	Y		21.60 mm	68 mm
29	Z½		22.00 mm	69 mm
30		13	22.30 mm	70 mm
31	Z+2	13½	22.60 mm	71 mm

Ring sizes - CHART

How to define a ring size?

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