BETTER DAY(S) PRIORITY ring size is based on international standards (ISO). Please refer the ring size conversion chart below to see the measurements based on other regional standards.
* Depending on the width and design of the ring, the feeling of wearing may differ slightly even if the size is the same.
BETTER DAY(S) PRIORITY EU Size
Ring Diameter (mm)
Ring Inner Length (mm)
Japanese Size
US Size
British Size
41
13
40.8
1
1
C
42
13 1/3
41.9
2
2
D
43
13 2/3
42.9
3
2.5
E
44
14
44
4
3
F
45
14 1/3
45
5
3.5
G
46
14 2/3
46.1
6
3.5-4
G-H
47
15
47.1
7
4
H-I
48
15 1/3
48.2
8
4.5-5
I-J
49
15 2/3
49.2
9
5
J
50
16
50.3
10
5.5
K
51
16 1/3
51.3
11
6
L
52
16 2/3
52.4
12
6.5
L-M
53
17
53.4
13
6.5-7
M-N
54
17 1/3
54.5
14
7-7.5
N-O
55
17 2/3
55.5
15
7.5-8
O-P
56
18
56.6
16
8
P
57
18 1/3
57.6
17
8.5
Q
58
18 2/3
58.6
18
9
R
59
19
59.7
19
9.5
S
60
19 1/3
60.7
20
10
T
61
19 2/3
61.8
21
10-10.5
T-U
62
20
62.8
22
10.5
U
63
20 1/3
63.9
23
11
V
64
20 2/3
64.9
24
11.5
W
65
21
66
25
12
X
66
21 1/3
67
26
12.5
Y
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