Ring Sizing Guide

This chart is a guide to help you work out your ring size. Marianne makes rings following British sizing guides. Please use this chart to gauge the closest equivalent size to your country sizing scale. If you are unsure of how your country's sizing translates into UK sizes please get in touch for help.

Please select the ring size on the product page when ordering. If the size you need isn't listed please get in touch as it is possible to custom make in any size for you. All rings are made to order in your size so will take up to 3 weeks for delivery.

Please see information about ordering your correct ring size on the FAQ page.

UK Size Inside Diameter mm US SIZE Inside Diameter mm European Size Inside Diameter mm
A 12.07     38 12.10
A 1/2 12.26 1 12.34    
B 12.46     39 12.41
B1/2 12.66 1 1/2 12.75 40 12.73
C 12.85        
C1/2 13.05 2 13.16 41 13.05
D 13.25     42 13.37
D1/2 13.44 2 1/2 13.56    
E 13.64     43 13.69
E1/2 13.84 3 13.97    
F 14.03     44 14.01
F1/2 14.23 3 1/2 14.38 45 14.32
G 14.43        
G1/2 14.27 4 14.78 46 14.64
H 14.82     47 14.96
H1/2 15.02 4 1/2 15.19    
I 15.22     48 15.28
I1/2 15.41 5 15.60 49 15.60
J 15.61        
J1/2 15.81     50 15.92
K 16.00 5 1/2 16.00 51 16.23
K1/2 16.20        
L 16.40 6 16.40 52 16.55
L1/2 16.59     53 16.87
M 16.79 6 1/2 16.82    
M1/2 16.99        
N 17.18 7 17.22 54 17.19
N1/2 17.38        
O 17.58 7 1/2 17.63 55 17.51
O1/2 17.78     56 17.83
P 17.97 8 18.03    
P1/2 18.17     57 18.14
Q 18.36 8 1/2 18.45 58 18.46
Q1/2 18.56        
R 18.58 9 18.87 59 18.78
R1/2 18.96     60 19.10
S 19.15 9 1/2 19.28    
S1/2 19.35     61 19.42
T 19.55 10 19.76 62 19.74
T1/2 19.74        
U 19.94        
U1/2 20.14 10 1/2 20.17 63 20.05
V 20.33     64 20.37
V1/2 20.53 11 20.60    
W 20.73     65 20.69
W1/2 20.93 11 1/2 21.01    
X 21.12     66 21.01
X1/2 21.32 12 21.41 67 21.33
Y 21.51        
Y1/2 21.71 12 1/2 21.82 68 21.65
Z 21.91     69 21.96
Z1/2 22.11 13 22.23    

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