Ring Size Chart

International Ring Size Chart

UK / AU Size	US Size	EU Size (mm)	Japan Size	China Size	Inside Diameter (mm)	Circumference (mm)
F	3.0	44.2	6	6	14.1	44.2
F½	3.25	44.8	7	7	14.3	44.8
G	3.5	45.5	8	8	14.5	45.5
G½	3.75	46.1	9	9	14.7	46.1
H	4.0	46.8	10	10	14.9	46.8
H½	4.25	47.4	11	11	15.1	47.4
I	4.5	48.0	12	12	15.3	48.0
I½	4.75	48.7	13	13	15.5	48.7
J	5.0	49.3	14	14	15.7	49.3
J½	5.25	50.0	15	15	15.9	50.0
K	5.5	50.6	16	16	16.1	50.6
K½	5.75	51.2	17	17	16.3	51.2
L	6.0	51.9	18	18	16.5	51.9
L½	6.25	52.5	19	19	16.7	52.5
M	6.5	53.1	20	20	16.9	53.1
M½	6.75	53.8	21	21	17.1	53.8
N	7.0	54.4	22	22	17.3	54.4
N½	7.25	55.1	23	23	17.5	55.1
O	7.5	55.7	24	24	17.7	55.7
O½	7.75	56.3	25	25	17.9	56.3
P	8.0	57.0	26	26	18.1	57.0
P½	8.25	57.6	27	27	18.3	57.6
Q	8.5	58.3	28	28	18.5	58.3
Q½	8.75	58.9	29	29	18.7	58.9
R	9.0	59.5	30	30	18.9	59.5
R½	9.25	60.2	31	31	19.1	60.2
S	9.5	60.8	32	32	19.3	60.8
S½	9.75	61.4	33	33	19.5	61.4
T	10.0	62.1	34	34	19.7	62.1
T½	10.25	62.7	35	35	19.9	62.7
U	10.5	63.4	36	36	20.1	63.4
U½	10.75	64.0	37	37	20.3	64.0
V	11.0	64.6	38	38	20.5	64.6
V½	11.25	65.3	39	39	20.7	65.3
W	11.5	65.9	40	40	20.9	65.9
W½	11.75	66.6	41	41	21.1	66.6
X	12.0	67.2	42	42	21.3	67.2
X½	12.25	67.8	43	43	21.5	67.8
Y	12.5	68.5	44	44	21.7	68.5
Y½	12.75	69.1	45	45	21.9	69.1
Z	13.0	69.7	46	46	22.1	69.7
Z+½	13.25	70.4	47	47	22.3	70.4
Z+1	13.5	71.0	48	48	22.5	71.0

How to Measure Your Ring Size

Measure at the Right Time: Fingers are slightly larger in the evening and in warm weather.
Use a Ring Sizer or Existing Ring: Measure the inside diameter of a well-fitting ring or use a professional ring sizer.
Consider Knuckles: Choose a size that slides comfortably over the knuckle but is snug at the base.
Wider Bands: For bands wider than 6mm, consider half a size larger for comfort.