Bra Size Calculation
Cup Chart  
( Z ) Differences in CM
AA 7 8  
9 10 11
B 12 13  
C 14 15 16
D 17 18  
E 19 20 21
F 22 23  
G 24 25 26
H 27 28  
 
   
   
Underbust_range_(Y)
63~67 
68~72
73~77
78~82
83~87
88~92
93~97
98~102
103~107
108~112
113~117
118~122
 
65 cm 
70 cm
75 cm 
80 cm 
85 cm 
90 cm
95cm
100 cm 
105 cm 
110 cm 
115 cm 
120 cm 
 
Topbust (X) 72cm - 151cm
 
Formula :
Cup Size (Z) = Differences in CM
Cup Size (Z)  Topbust (X) - Underbust (Y)
Example :
Topbust = 90cm Underbust = 66cm
Cup Size = 90 - 66 
Differences in CM = 24 ( refer to cup chart )
Cup Size = G
Underbust = 65cm ( 66cm fall under the range of 63-67, therefore, it is 65cm in definite)
Bra Size = G 65