Ring Size Conversion Chart


UK
US 4
JAPAN 7
EURO 6
DIAMETER (mm) 14.8
CIRCUMFERENCE (mm) 46.5
UK
US
JAPAN 8
EURO 8
DIAMETER (mm) 15.2
CIRCUMFERENCE (mm) 48
UK
US 5
JAPAN 9
EURO 9
DIAMETER (mm) 15.6
CIRCUMFERENCE (mm) 49
UK L
US
JAPAN 10
EURO 10
DIAMETER (mm) 16
CIRCUMFERENCE (mm) 50.5
UK M
US 6
JAPAN 12
EURO 12
DIAMETER (mm) 16.4
CIRCUMFERENCE (mm) 52
UK N
US
JAPAN 13
EURO 13
DIAMETER (mm) 16.8
CIRCUMFERENCE (mm) 53
UK O
US 7
JAPAN 14
EURO 14
DIAMETER (mm) 17.3
CIRCUMFERENCE (mm) 54.5
UK P
US
JAPAN 15
EURO 15
DIAMETER (mm) 17.7
CIRCUMFERENCE (mm) 55.5
UK Q
US 8
JAPAN 16
EURO 17
DIAMETER (mm) 18.1
CIRCUMFERENCE (mm) 57
UK
US
JAPAN 17
EURO 18
DIAMETER (mm) 18.5
CIRCUMFERENCE (mm) 58
UK
US 9
JAPAN 18
EURO 19
DIAMETER (mm) 18.9
CIRCUMFERENCE (mm) 59.5
UK
US
JAPAN 20
EURO 21
DIAMETER (mm) 19.3
CIRCUMFERENCE (mm) 61
UK
US 10
JAPAN 21
EURO 22
DIAMETER (mm) 19.7
CIRCUMFERENCE (mm) 62
UK
US 10½
JAPAN 22
EURO 23
DIAMETER (mm) 20.1
CIRCUMFERENCE (mm) 63.5
UK
US 11
JAPAN 24
EURO 24
DIAMETER (mm) 20.6
CIRCUMFERENCE (mm) 64.5
UK
US 11½
JAPAN 25
EURO 26
DIAMETER (mm) 21
CIRCUMFERENCE (mm) 66
UK Y
US 12
JAPAN 26
EURO 27
DIAMETER (mm) 21.4
CIRCUMFERENCE (mm) 67.5
UK Z
US 12½
JAPAN 27
EURO 28
DIAMETER (mm) 21.8
CIRCUMFERENCE (mm) 68.5
UK Z+1
US 13
JAPAN 28
EURO 30
DIAMETER (mm) 22.2
CIRCUMFERENCE (mm) 70
UK Z+2
US 13½
JAPAN 29
EURO 31
DIAMETER (mm) 22.6
CIRCUMFERENCE (mm) 71
UK Z+3
US 14
JAPAN 31
EURO 32
DIAMETER (mm) 23
CIRCUMFERENCE (mm) 72.5
UK Z+4
US 14½
JAPAN 32
EURO 34
DIAMETER (mm) 23.4
CIRCUMFERENCE (mm) 74
UK Z+5
US 15
JAPAN 33
EURO 35
DIAMETER (mm) 23.9
CIRCUMFERENCE (mm) 75