International Ring Size Conversion Table

At Revolution, we proudly serve customers from around the world, ensuring everyone can find the perfect ring in the right size. Since ring sizing standards vary by country, we’ve created this international ring size conversion chart to help you easily determine the correct size no matter where you’re located. Whether you're converting from US, UK, Japanese, or other sizing systems, this guide makes the process simple. Additionally, we offer rings sizers to help you find the most accurate fit before placing your order. Use the chart below to help ensure your ring fits comfortably and securely.

US & Canada	UK & Australian	French & Russian	German	Japanese	Swiss
3	F - F 1/2	44	14	4	4
3.25	F 3/4 - G	45	-	5	5
3.5	G 1/4 - G 1/2	-	14 1/2	6	5.5
3.75	H - H 1/4	46	-	-	6
4	H 1/2 - H 3/4	-	15	7	7
4.25	I - I 1/4	47	-	-	-
4.5	I 1/2 - J	48	-	8	8
4.75	J 1/4	49	15 1/2	-	9
5	J 1/2 - K	-	-	9	-
5.25	K 1/4 - K 1/2	50	-	10	10
5.5	K 3/4 - L	51	16	-	11
5.75	L 1/4 - L 1/2	-	-	11	-
6	L 3/4 - M 1/4	52	16 1/2	12	12
6.25	M 1/2 - M 3/4	53	-	-	13
6.5	N - N 1/4	-	17	13	14
6.75	N 1/2 - N 3/4	54	-	-	-
7	O - O 1/4	-	-	14	-
7.25	O 1/2 - O 3/4	55	17 1/2	-	15
7.5	P - P 1/4	56	-	15	16
7.75	P 1/2 - P 3/4	-	-	-	-
8	Q - Q 1/4	57	18	16	17
8.25	Q 1/2	58	-	-	18
8.5	Q 3/4 - R	-	18 1/2	17	-
8.75	R 1/4 - R 1/2	59	-	-	19
9	R 3/4 - S	-	19	18	-
9.25	S 1/4 - S 1/2	60	-	-	20
9.5	S 3/4 - T	61	19 1/2	19	21
9.75	T 1/4	62	-	-	-
10	T 1/2 - T 3/4	-	20	20	22
10.25	U - U 1/4	63	-	21	23
10.5	U 1/2 - V	-	-	22	-
10.75	V 1/4	64	20 1/2	-	24
11	V 1/2 - W	65	-	23	-
11.25	W 1/4 - W 1/2	66	-	-	25
11.5	W 3/4 - X	-	21	24	26
11.75	X 1/4 - X 1/2	67	-	-	-
12	Y - Y 1/4	-	21 1/2	25	27
12.25	Y 1/2 - Y 3/4	68	-	-	28
12.5	Z - Z 1/4	69	-	26	-
12.75	Z+1/2 - Z+3/4	-	22	-	29
13	Z+1	70	-	27	30
13.25	-	-	-	-	-
13.5	Z+1.5	71	22 1/2	-	31
13.75	Z+2	-	-	-	32
14	Z+3	72	23	-	-
14.25	-	73	-	-	33
14.5	Z+4	-	23 1/2	-	-
14.75	-	74	-	-	34
15	Z+5	75	24	-	35
15.5	Z+6	-	24 1/1	-	36
16	Z+7	-	-	-	37