Ring size guide

UK Wheatsheaf Size	Target Circumference mm	Rounded Circumference mm
A	37.385	37.5
A+	38.013	38
B	38.642	39
B+	39.270	39.5
C	39.898	40
C+	40.527	40.5
D	41.155	41
D+	41.783	42
E	42.412	42.5
E+	43.040	43.0
F	43.668	44.0
F+	44.296	44.5
G	44.925	45
G+	45.553	45.5
H	46.181	46
H+	46.81	47
I	47.438	47.5
I+	48.066	48
J	48.695	49
J+	49.323	49.5
K	49.951	50
K+	50.58	50.5
L	51.208	51
L+	51.836	52
M	52.465	52.5
M+	53.093	53
N	53.721	54
N+	54.35	54.5
O	54.978	55
O+	55.606	55.5
P	56.235	56
P+	56.863	57
Q	57.491	57.5
Q+	58.119	58
R	58.748	59
R+	59.376	59.5
S	60.004	60
S+	60.633	60.5
T	61.261	61
T+	61.889	62
U	62.518	62.5
U+	63.146	63
V	63.774	64
V+	64.403	65.5
W	65.031	65
W+	65.659	65.5
X	66.288	66
X+	66.916	67
Y	67.544	67.5
Y+	68.173	68
Z	68.801	69
Z+	69.429	69.5
Z1	70.058	70
Z1+	70.686	70.5
Z2	71.314	71
Z2+	71.942	72
Z3	72.571	72.5
Z3+	73.199	73
Z4	73.827	74
Z4+	74.456	74.5
Z5	75.084	75
Z5+	75.712	76