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International Ring Size Conversion Chart

Home > Ring Size Chart

In light of our growing international sales, we are pleased to include an easy ring size conversion chart for your use below.

We highly recommend that you either measure the inner diameter of a current ring, or visit a local jeweler for an accurate ring size measurement *before* placing your order. 

This will ensure the ring arrives ready to wear or gift without requiring additional work.  We request that orders are placed using the US ring size.

 

BetterThanDiamond.com International Ring Size Chart:

Inner Diameter
(mm)
Inner
Circumference
(mm)
US and Canada
Ring Size
Australia,
UK, Ireland
Japan,
China
11.63 36.5 0    
11.84 37.2 .25    
12.04 37.8 .50 A
12.24   .75 A 1/2  
12.45   1.0 B 1
12.65   1.25 B 1/2  
12.85   1.50 C  
13.06   1.75 C 1/2  
13.26   2.00 D 2
13.46   2.25 D 1/2  
13.67   2.50 E 3
13.87   2.75 E 1/2  
14.07   3.00 F 4
14.27   3.25 F 1/2 5
14.48   3.50 G  
14.68   3.75 G 1/2 6
14.88   4.00 H 7
15.00   4.25 H 1/2  
15.29   4.50 I 8
15.49   4.75 J  
15.70   5.00 J 1/2 9
15.90   5.25 K  
16.10   5.50 K 1/2 10
16.31   5.75 L  
16.51   6.00 L 1/2 11
16.71   6.25 M 12
16.92   6.50 M 1/2 13
17.12   6.75 N  
17.32   7.00 N 1/2 14
17.53   7.25 O  
17.73   7.50 O 1/2 15
17.93   7.75 P  
18.14   8.00 P 1/2 16
18.34   8.25 Q  
18.54   8.50 Q 1/2 17
18.75   8.75 R  
18.95   9.00 R 1/2 18
19.15   9.25 S  
19.35   9.50 S 1/2 19
19.56   9.75 T  
19.76   10.00 T 1/2 20
19.96   10.25 U 21
20.17   10.50 U 1/2 22
20.37   10.75 V  
20.57   11.00 V 1/2 23
20.78   11.25 W  
20.98   11.50 W 1/2 24
21.18   11.75 X  
21.39   12.00 X 1/2 25
21.59   12.25 Y  
21.79   12.50 Z 26
22.00   12.75 Z 1/2  
22.20   13.00   27
22.40   13.25 Z1  
22.61   13.50    
22.81   13.75 Z2  
23.01   14.00 Z3  
23.22   14.25    
23.42   14.50 Z4  
23.62   14.75    
23.83   15.00    
24.03   15.25    
24.23   15.50    
24.43   15.75    
24.64   16.00    
         

 

If you have any other question regarding our ring sizing, please feel free to
email us.

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Content and images, copyright 2007, BetterThanDiamond.com