Brazilian Ring Size Conversion Chart

To use the ring size conversion tool, simply:

Select the size standard from the dropdown list (it is set to Brazil as standard on this page)
Select the ring size
Then the tool will show you the exact or closest matches in the other size standards and allows you to see the small differences in sizes between the closest matched sizes

Brazilian Ring Size Conversion Chart

Below we have also included a full Brazilian ring size conversion chart that shows:

US to US ring sizes (also using in Canada and Mexico)
US to UK ring sizes (also used in Australia, New Zealand and South Africa)
US to European ring sizes (used by Germany, France and Scandinavian countries)
US to Swiss ring sizes (used in Switzerland, Spain and Italy)
US to Japanese ring sizes

Brazil	USA/Canada	UK/Australia	Europe	Switzerland	Japan	Diameter (mm/in)	Circumference (mm/in)
7	3	E 1/2	44	4	4	14.0 mm / 0.55 in	44.0 mm / 1.73 in
8	3.5	F 1/2	45	4.5	5	14.3 mm / 0.56 in	45.0 mm / 1.77 in
9	3.75	G	46	5	6	14.6 mm / 0.57 in	46.0 mm / 1.81 in
10	4	H	47	5.5	7	15.0 mm / 0.59 in	47.0 mm / 1.85 in
11	4.5	I	48	6	8	15.3 mm / 0.60 in	48.0 mm / 1.89 in
12	4.75	J	49	6.5	9	15.6 mm / 0.61 in	49.0 mm / 1.93 in
13	5.25	K	50	7	10	15.9 mm / 0.63 in	50.0 mm / 1.97 in
14	5.5	K 1/2	51	7.5	11	16.2 mm / 0.64 in	51.0 mm / 2.01 in
15	6	L 1/2	52	8	12	16.5 mm / 0.65 in	52.0 mm / 2.05 in
16	6.5	M 1/2	53	8.5	13	16.9 mm / 0.67 in	53.0 mm / 2.09 in
17	6.75	N	54	9		17.2 mm / 0.68 in	54.0 mm / 2.13 in
18	7.25	O	55	9.5	14	17.5 mm / 0.69 in	55.0 mm / 2.17 in
19	7.75	P	56	10	15	17.8 mm / 0.70 in	56.0 mm / 2.20 in
20	8	P 1/2	57	10.5	16	18.1 mm / 0.71 in	57.0 mm / 2.24 in
21	8.5	Q 1/2	58	11	17	18.5 mm / 0.73 in	58.0 mm / 2.28 in
22	8.75	R	59	11.5	18	18.8 mm / 0.74 in	59.0 mm / 2.32 in
23	9.25	S	60	12	19	19.1 mm / 0.75 in	60.0 mm / 2.36 in
24	9.5	S 1/2	61	12.5	20	19.4 mm / 0.76 in	61.0 mm / 2.40 in
25	10	T 1/2	62	13	21	19.8 mm / 0.78 in	62.0 mm / 2.44 in
26	10.5	U 1/2	63	13.5	22	20.1 mm / 0.79 in	63.0 mm / 2.48 in
27	10.75	V	64	14	23	20.4 mm / 0.80 in	64.0 mm / 2.52 in
28	11	V 1/2	65	14.5	24	20.7 mm / 0.81 in	65.0 mm / 2.56 in
29	11.25	W 1/2	66	15	25	21.0 mm / 0.83 in	66.0 mm / 2.60 in
30	11.75	X 1/2	67	15.5	26	21.3 mm / 0.84 in	67.0 mm / 2.64 in
31	12.25	Y 1/2	68	16	27	21.7 mm / 0.85 in	68.0 mm / 2.68 in
32	12.5	Z 1/2	69	16.5	28	22.0 mm / 0.87 in	69.0 mm / 2.72 in
33	13		70	17	29	22.3 mm / 0.88 in	70.0 mm / 2.76 in
34		Z+1			30	22.6 mm / 0.89 in	71.0 mm / 2.80 in
35		Z+2				22.9 mm / 0.90 in	72.0 mm / 2.83 in

Brazil

USA/Canada

UK/Australia

Europe

Switzerland

Japan

Diameter
(mm/in)

Circumference
(mm/in)

E 1/2

14.0 mm / 0.55 in

44.0 mm / 1.73 in

3.5

F 1/2

4.5

14.3 mm / 0.56 in

45.0 mm / 1.77 in

3.75

14.6 mm / 0.57 in

46.0 mm / 1.81 in

5.5

15.0 mm / 0.59 in

47.0 mm / 1.85 in

4.5

15.3 mm / 0.60 in

48.0 mm / 1.89 in

4.75

6.5

15.6 mm / 0.61 in

49.0 mm / 1.93 in

5.25

15.9 mm / 0.63 in

50.0 mm / 1.97 in

5.5

K 1/2

7.5

16.2 mm / 0.64 in

51.0 mm / 2.01 in

L 1/2

16.5 mm / 0.65 in

52.0 mm / 2.05 in

6.5

M 1/2

8.5

16.9 mm / 0.67 in

53.0 mm / 2.09 in

6.75

17.2 mm / 0.68 in

54.0 mm / 2.13 in

7.25

9.5

17.5 mm / 0.69 in

55.0 mm / 2.17 in

7.75

17.8 mm / 0.70 in

56.0 mm / 2.20 in

P 1/2

10.5

18.1 mm / 0.71 in

57.0 mm / 2.24 in

8.5

Q 1/2

18.5 mm / 0.73 in

58.0 mm / 2.28 in

8.75

11.5

18.8 mm / 0.74 in

59.0 mm / 2.32 in

9.25

19.1 mm / 0.75 in

60.0 mm / 2.36 in

9.5

S 1/2

12.5

19.4 mm / 0.76 in

61.0 mm / 2.40 in

T 1/2

19.8 mm / 0.78 in

62.0 mm / 2.44 in

10.5

U 1/2

13.5

20.1 mm / 0.79 in

63.0 mm / 2.48 in

10.75

20.4 mm / 0.80 in

64.0 mm / 2.52 in

V 1/2

14.5

20.7 mm / 0.81 in

65.0 mm / 2.56 in

11.25

W 1/2

21.0 mm / 0.83 in

66.0 mm / 2.60 in

11.75

X 1/2

15.5

21.3 mm / 0.84 in

67.0 mm / 2.64 in

12.25

Y 1/2

21.7 mm / 0.85 in

68.0 mm / 2.68 in

12.5

Z 1/2

16.5

22.0 mm / 0.87 in

69.0 mm / 2.72 in

22.3 mm / 0.88 in

70.0 mm / 2.76 in

Z+1

22.6 mm / 0.89 in

71.0 mm / 2.80 in

Z+2

22.9 mm / 0.90 in

72.0 mm / 2.83 in