Ring Size Chart

Determine your ring size by using this chart. Please keep in mind that sizing of some rings may differ slightly depending on their style.

New Zealand (UK, AU)	US & Canada	Inner diameter (mm)	Inner Circumference (mm)
A	½	12.04 mm	37.8 mm
A½	¾	12.24 mm	38.5 mm
B	1	12.45 mm	39.1 mm
B½	1¼	12.65 mm	39.7 mm
C	1½	12.85 mm	40.4 mm
C½	1¾	13.06 mm	41 mm
D	2	13.26 mm	41.7 mm
D½	2¼	13.46 mm	42.3 mm
E	2½	13.67 mm	42.9 mm
E½	2¾	13.87 mm	43.6 mm
F	3	14.07 mm	44.2 mm
F½	3¼	14.27 mm	44.8 mm
G	3½	14.48 mm	45.5 mm
G½	3¾	14.68 mm	46.1 mm
H	4	14.88 mm	46.8 mm
H½	4¼	15.09 mm	47.4 mm
I	4½	15.29 mm	48 mm
J	4¾	15.49 mm	48.7 mm
J½	5	15.7 mm	49.3 mm
K	5¼	15.9 mm	50 mm
K½	5½	16.1 mm	50.6 mm
L	5¾	16.31 mm	51.2 mm
L½	6	16.51 mm	51.9 mm
M	6¼	16.71 mm	52.5 mm
M½	6½	16.92 mm	53.1 mm
N	6¾	17.12 mm	53.8 mm
N½	7	17.32 mm	54.4 mm
O	7¼	17.53 mm	55.1 mm
O½	7½	17.73 mm	55.7 mm
P	7¾	17.93 mm	56.3 mm
P½	8	18.14 mm	57 mm
Q	8¼	18.34 mm	57.6 mm
Q½	8½	18.54 mm	58.3 mm
R	8¾	18.75 mm	58.9 mm
R½	9	18.95 mm	59.5 mm
S	9¼	19.15 mm	60.2 mm
S½	9½	19.35 mm	60.8 mm
T	9¾	19.56 mm	61.4 mm
T½	10	19.76 mm	62.1 mm
U	10¼	19.96 mm	62.7 mm
U½	10½	20.17 mm	63.4 mm
V	10¾	20.37 mm	64 mm
V½	11	20.57 mm	64.6 mm
W	11¼	20.78 mm	65.3 mm
W½	11½	20.98 mm	65.9 mm
X	11¾	21.18 mm	66.6 mm
X½	12	21.39 mm	67.2 mm
Y	12¼	21.59 mm	67.8 mm
Z	12½	21.79 mm	68.5 mm
Z½	12¾	22 mm	69.1 mm