Size Guide

RING SIZE GUIDE

AU/UK   DIAMETER (mm)

I              15.2 mm

I 1/2       15.4 mm

J              15.6 mm

J 1/2      15.8 mm

K             16.0 mm

K 1/2     16.1 mm

L             16.4 mm

L 1/2      16.6 mm

M           16.8 mm

M 1/2    17.0 mm

N            17.2 mm

N 1/2     17.4 mm

O            17.6 mm

O 1/2     17.8 mm

P             18.0 mm

P 1/2     18.2 mm

Q            18.4 mm

Q 1/2     18.6 mm

R             18.8 mm

R 1/2     19.0 mm

S             19.2 mm

S 1/2      19.4 mm

T             19.5 mm

T 1/2      19.8 mm

U            19.9 mm

 

EUROPEAN         DIAMETER (mm)

48           15.3 mm

49           15.6 mm

50           15.9 mm

51           16.2 mm

52           16.6 mm

53           16.9 mm

54           17.2 mm

55           17.5 mm

56           17.8 mm

57           18.1 mm

58           18.5 mm

59           18.8 mm

60           19.1 mm

61           19.4 mm

61.5       19.84 mm

 

US          DIAMETER (mm)

5             15.6 mm

5 ½         16.0 mm

6             16.4 mm

6 ½         16.8 mm

7             17.2 mm

7 ½         17.6 mm

8             18.0 mm

8 ½         18.4 mm

9             19.2 mm

10           19.84 mm

 

For further information on sizing, check out the international ring size conversion chart.