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: Ring Size Chart
GemSelect Ring Size Chart
Circumference
(mm)
Diameter
(mm)
Europe UK& Australia United States & Canada China Singapore & Japan Hong Kong Switzerland
44.2 14.1 44 3 6 4 6 4
44.8 14.3 45 G     5 5
45.5 15.5   7   7.5  
46.1 14.7 46 H     6  
46.8 14.9 47 4 8 7 9  
47.4 15.1   I   9    
48.0 15.3 48   8 10  
48.7 15.5   J         9
49.3 15.7 49 5 10 9 11  
50.0 15.9 50 K         10
50.6 16.1   11 10 12  
51.2 16.3 51 L         11¾
51.9 16.5 52 6 12 11 13 12¾
52.5 16.7   M   13 12    
53.1 16.9 53   13 14.5 14
53.8 17.1   N   14      
54.4 17.3 54 7   14 16 15 ¼
55.1 17.5 55 O   15      
55.7 17.7     15 17 16½
56.3 17.9 56 P   16      
57.0 18.1 57 8 17 16   17¾
57.2 18.2           18  
57.6 18.3   Q          
58.3 18.5 58 18 17 19  
58.9 18.8 59 R         19
59.5 19.0   9 19 18 20.5  
60.2 19.2 60 S   20     20¼
60.8 19.4 61   19 22  
61.4 19.6   T   21     21½
62.1 19.8 62 10   20 23  
62.7 20.0   U   22 21    
63.4 20.2 62 10½   22 24 22¾
64.0 20.4 64 V   23      
64.6 20.6   11   23 25  
65.3 20.8 65 W   24     25
65.9 21.0 66 11½ 25 24 26  
66.6 21.2   X          
67.2 21.4 67 12 26 25 27.75 27½
67.8 21.6   Y          
68.5 21.8 68 Z 12½   26   28¾
69.1 22.0 69          
69.7 22.2 70   13   27 30  
70.4 22.4   Z+1          
71.0 22.6   Z+2 13½        
  • First Published: April-11-2016
  • Last Updated: July-07-2017
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    Reproduction (text or graphics) without the express written consent of GemSelect.com (SETT Company Ltd.) is strictly prohibited.
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart